This is a partial list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location. The list also includes a final year of operation for many observatories that are no longer in operation. While other sciences, such as volcanology and meteorology, also use facilities called observatories for research and observations, this list is limited to observatories that are used to observe celestial objects.

Astronomical observatories are mainly divided into four categories: space-based, airborne, ground-based, and underground-based.

Many modern telescopes and observatories are located in space to observe astronomical objects in wavelengths of the electromagnetic spectrum that cannot penetrate the Earth's atmosphere (such as ultraviolet radiation, X-rays, and gamma rays) and are thus impossible to observe using ground-based telescopes.{{cite book

| last = Chaisson| first = Eric|author2=McMillan, Steve | title = Astronomy Today, Fourth Edition| publisher = Prentice Hall| year = 2002}} Being above the atmosphere, these space observatories can also avoid the effects of atmospheric turbulence that plague ground based telescopes, although new generations of adaptive optics telescopes have since then dramatically improved the situation on the ground. The space high vacuum environment also frees the detectors from the ancestral diurnal cycle due to the atmospheric blue light background of the sky, thereby increasing significantly the observation time.

An intermediate variant is the airborne observatory, specialised in the infrared wavelengths of the electromagnetic spectrum, that conduct observations above the part of the atmosphere containing water vapor that absorbs them, in the stratosphere.

Historically, astronomical observatories consisted generally in a building or group of buildings where observations of astronomical objects such as sunspots, planets, asteroids, comets, stars, nebulae, and galaxies in the visible wavelengths of the electromagnetic spectrum were conducted. At first, for millennia, astronomical observations have been made with naked eyes. Then with the discovery of optics, with the help of different types of refractor telescopes and later with reflector telescopes. Their use allowed to dramatically increase both the collecting power and limit of resolution, thus the brightness, level of detail and apparent angular size of distant celestial objects allowing them to be better studied and understood. Following the development of modern physics, new ground-based facilities have been constructed to conduct research in the radio and microwave wavelengths of the electromagnetic spectrum, with radio telescopes and dedicated microwave telescopes.

Modern astrophysics has extended the field of study of celestial bodies to non-electromagnetic vectors, such as neutrinos, neutrons and cosmic rays or gravitational waves. Thus, new types of observatories have been developed. Interferometers are at the core of gravitational wave detectors. In order to limit the natural or artificial background noise, most particle detector based observatories are built deep underground.

Observatories

class="wikitable sortable sticky-header"
width="40%" \|Name ! width="5%" \|Established ! width="30%" \|Location
Abastumani Astrophysical Observatory \|1932 \|Abastumani, Georgia
Abu Reyhan-e Birooni Observatory \|1976 \|Shiraz University, Shiraz, Iran
Adirondack Public Observatory \| \|Tupper Lake, New York, US
bgcolor=#CCCCCC \|Aditya-L1 \|2023 \|Sun-Earth L1
Adolphson Observatory \|2013 \|Monmouth, Illinois, US
Airdrie Public Observatory \|1896 \|Airdrie, Scotland, UK
Aker Observatory \|1995 \|Safford, Arizona, US
Aldershot Observatory \|1906 \|Aldershot, Hampshire, England, UK
bgcolor=#99CC99 \|Algonquin Radio Observatory \|1959 \|Algonquin Provincial Park, Ontario, Canada
Allegheny Observatory \|1859 \|Pittsburgh, Pennsylvania, US
Ametlla de Mar Observatory \|1992 \|l'Ametlla de Mar, Catalonia, Spain
bgcolor=#99CC99 \|AMiBA \|2006 \|Mauna Loa, Hawaii, US
Anderson Mesa Station \|1959 \|Flagstaff, Arizona, US
Andrushivka Astronomical Observatory \|2001 \|Andrushivka, Zhytomyr Oblast, Ukraine
Angell Hall Observatory \|1927 \|Ann Arbor, Michigan, US
Ankara University Observatory \|1963 \| Gölbaşı, Ankara, Turkey
bgcolor=#FFCC66 \|Antarctic Muon and Neutrino Detector Array \|2002 \|Antarctica
bgcolor=#00FF00 \|Antarctic Submillimeter Telescope and Remote Observatory \|1994–2005 \|Antarctica
bgcolor=#FFCC66 \|ANTARES \|2008 \|In the Mediterranean Sea near Toulon, France
[http://www.apache-sitgreaves.org/ Apache-Sitgreaves Observatory] \|2005 \|Overgaard, Arizona, US
Apache Point Observatory \|1985 \|Sunspot, New Mexico, US
bgcolor=#FFCC00 \|Apatity Cosmic-Ray Station \| \|Apatity, Russia
Apollo Observatory \|1969 \|Dayton, Ohio, US
Arcetri Observatory \| \|Arcetri, Florence, Italy
bgcolor=#99CC99 \|Arecibo Observatory \|1963 \|Arecibo, Puerto Rico, US
bgcolor=#99CC99 \|Argentine Institute of Radio Astronomy \|1966 \|Berazategui Partido, Buenos Aires Province, Argentina
Armagh Observatory \|1790 \|Armagh, UK
Aryabhatta Research Institute of Observational Sciences \|1954 \|Nainital, Uttarakhand, India
Ashton Observatory \|1983 \|Baxter, Iowa, US
Asiago Astrophysical Observatory \|1942 \|Asiago, Italy
Assheton Observatory \|1860 \|Lancashire, UK
bgcolor=#CCCCCC \|Astron (defunct) \|1983–1989 \|Highly eccentric Earth orbit
Astronomical Observatory Aurora \|2011 \|Hechingen, Germany
Astronomical Observatory of Lisbon \|1867 \|Lisbon, Portugal
Astronomy Centre \|1982 \|Todmorden, England
Astronomy Tower of the Sorbonne \|1885–1909 (only for amateur use since 1980) \|Paris, France
Astrophysical Institute Potsdam \|1992 \|Potsdam, Germany
bgcolor=#00FF00 \|Atacama Pathfinder Experiment (APEX) \|2003 \|Llano de Chajnantor Observatory, Chile
bgcolor=#99CC99 \|Australia Telescope Compact Array \|1988 \|Narrabri, Australia
Australian Astronomical Observatory \|1971 \|Coonabarabran, Australia
Badlands Observatory \|2000 \|Quinn, South Dakota, US
bgcolor=#FFCC66 \|Baikal Deep Underwater Neutrino Telescope \|1993 \|Baikal Lake, Russia
Bangladesh Astronomical Observatory{{cite web \|title=Bangladesh Astronomical Observatory \|url=http://bao.com.bd \|archive-url=https://web.archive.org/web/20200609160318/http://bao.com.bd/ \|archive-date=2020-06-09 }} \|2015 \|Dhaka, Bangladesh
Baker Observatory \|1980 \|Marshfield, Missouri, US
bgcolor=#FFCC66 \|Baksan Neutrino Observatory \|1977 \|Prielbrusye, Baksan Valley, Russia
Ball State University Observatory \| \|Muncie, Indiana, US
Barnard Observatory (defunct) \|1859 \|Oxford, Mississippi, US
Bareket Observatory \|1990 \|Maccabim, Israel
Barnett Observatory \|1960 \|Chesterfield, England, UK
Bayfordbury Observatory \|1969 \|Hertfordshire, England, UK
Behlen Observatory \|1972 \|Mead, Nebraska, US
Beijing Astronomical Observatory \|1958 \|Beijing, China
Beijing Ancient Observatory \|1442 \|Beijing, China
Belgrade Observatory \|1887 \|Belgrade, Serbia
Belogradchik Observatory \|1961 \|Belogradchik, Bulgaria
Benito Loyola Observatory \|2024 \|Virginia Beach, Virginia, US
Benmore Peak Observatory \|1996 \|Mackenzie Basin, South Island, New Zealand
BeppoSAX (defunct) \|1996–2003 \|Low Earth orbit
Bergisch Gladbach Observatory \|1995 \|Bergisch Gladbach, Germany
Berlin Observatory \|1711 \|Berlin, Germany
Besançon Observatory \|1882 \|Besançon, France
Beverly-Begg Observatory \|1922 \|Dunedin, South Island, New Zealand
Bidston Observatory \|1849 \|Bidston, England, UK
bgcolor=#FFFF99 \|Big Bear Lake Solar Observatory \|1969 \|Big Bear City, California, US
Bisdee Tier Optical Astronomy Observatory \|2010 \|Bisdee Tier, Spring Hill, Tasmania, Australia
Black Moshannon Observatory (defunct) \|1972 \|Pennsylvania, US
Blackett Observatory \|1930s \|Wiltshire, England, UK
Blue Mesa Observatory (defunct) \|1967 \|New Mexico, US
[http://members.westnet.com.au/~asnewcomputers/ Boambee Observatory] \|1987 \|Boambee, New South Wales, Australia
Bohyunsan Optical Astronomy Observatory (BOAO) \|1996 \| Youngchun, South Korea
BOOTES \|1985 \|Spain
Bordeaux Observatory \|1878 \|Floirac, France
Bosscha Observatory \|1923 \|Lembang, West Java, Indonesia
Boswell Observatory (defunct) \|1883 \|Crete, Nebraska, US
Bowman Observatory \|1940 \|Greenwich, Connecticut, US
Boyden Observatory \|1889 \|Bloemfontein, South Africa
Bradstreet Observatory \|1996 \|St. Davids, Pennsylvania, US
Brackett Observatory \|1908 \|Pomona College, Claremont, California, US{{cite web \|title=Brackett Observatory \|url=https://www.pomona.edu/academics/departments/physics-and-astronomy/facilities/brackett-observatory \|website=Physics and Astronomy Department \|publisher=Pomona College \|access-date=13 November 2024 \|language=en \|date=18 January 2017}}{{cite journal \| title=The Frank P. Brackett Observatory Dedication \| journal=Popular Astronomy \| volume=17 \| pages=14–19 \| date=January 1909 \| bibcode=1909PA.....17...14.}}
Bradley Observatory \|1950 \|Decatur, Georgia, US
Braeside Observatory (defunct) \|1976 \|Flagstaff, Arizona, US
Brera Observatory \|1764 \|Milan, Italy
Bridgewater State University Observatory \|2012 \|Bridgewater, Massachusetts, US
Brooks Observatory \| \|Toledo, Ohio, US
Brooks Astronomical Observatory \|1964 \|Mount Pleasant, Michigan, US
Brorfelde Observatory \|1953 \|Holbæk, Denmark
Bucharest Astronomical Observatory \|1910 \|Bucharest, Romania
Bucknell Observatory \| \|Lewisburg, Pennsylvania, US
Burrell Memorial Observatory \|1940 \|Berea, Ohio, US
Byurakan Observatory \|1946 \|Mount Aragats, Armenia
Cagigal Observatory \|1888 \|Caracas, Venezuela
Cagliari Observatory \|1899 \|Cagliari, Sardinia, Italy
bgcolor=#FFFFFF \|Calais Observatory (defunct) \|1857 \|Calais, Maine, US
Calar Alto Observatory \|1975 \|Almería, Spain
-bgcolor=#00FF00 \|Caltech Submillimeter Observatory (defunct) \|1986 \|Mauna Kea, Hawaii, US
Cambridge Observatory \|1823 \|Cambridge, UK
Camille Flammarion Observatory \|1883 \|Juvisy-sur-Orge, France
Campbelltown Rotary Observatory \|2000 \|Campbelltown, NSW, Australia
Campo Imperatore Near-Earth Object Survey \|2001 \|Campo Imperatore, Italy
Canopus Hill Observatory \| \|Hobart, Tasmania, Australia
Capilla Peak Observatory \|1947 \|Albuquerque, New Mexico, US
Capodimonte Observatory \|1812 \|Naples, Italy
Carter Observatory \|1937 \|Wellington, New Zealand
Catania Astrophysical Observatory \| \|Catania, Italy
Cawthron Atkinson Observatory \|1883 \|Nelson, New Zealand
Celestial Observatory \| \|Russellville, Arkansas, US
Centennial Observatory \|2004 \|Twin Falls, Idaho, US
Center for Astrophysics {{!}} Harvard & Smithsonian \|1973 \|Cambridge, Massachusetts, US
Cerro Armazones Observatory \|1995 \|Atacama Desert, Chile
Cerro Tololo Inter-American Observatory \|1962 \|Atacama Desert, Chile
Cerro Pachón Observatory \|2000 \|Atacama Desert, Chile
Chabot Space & Science Center \|1883 \|Oakland, California, US
Chamberlin Observatory \|1890 \|Denver, Colorado, US
Changchun Astronomical Observatory \| \|Changchun, Jilin Province, China
bgcolor=#CCCCCC \|Chandra X-ray Observatory \|1999 \|Highly eccentric Earth orbit
Chianti Polifunctional Observatory \|2013 \|San Donato in Poggio, Florence, Italy
Chico Community Observatory \|2001 \|Chico, California, US
bgcolor=#99CC99 \|Chilbolton Observatory \|1967 \|Chilbolton, UK
Cima Ekar Observing Station \|1966 \|Asiago, Italy
Cincinnati Observatory \|1843 \|Cincinnati, Ohio, US
City Observatory, Edinburgh \|1818 \|Edinburgh, Scotland, UK
Clarke Observatory \|1897 / 1923 \|Dunkirk, New York / Alliance, Ohio, US
Class of 1951 Observatory \|1997 \|Poughkeepsie, New York, US
Cloudcroft Observatory (defunct) \|1962 \|New Mexico, US
Coats Observatory \|1883 \|Paisley, Scotland, UK
Coit Observatory \| \|Boston, Massachusetts, US
Collins Observatory \|2003 \|Corning, New York, US
Collm Observatory \| \|Leipzig, Germany
Colombo University Observatory \| 1920s \|Colombo, Sri Lanka
bgcolor=#CCCCCC \|Compton Gamma-Ray Observatory (defunct) \|1991–2000 \|Low Earth orbit
bgcolor=#FFFFFF \|ÇOMÜ Ulupınar Observatory \|2002 \|Çanakkale, Turkey
Concordia College Observatory \| \|Moorhead, Minnesota, US
Consell Observatory \|1987 \|Majorca, Spain
Copenhagen University Observatory \|1861 \|Copenhagen, Denmark
Cordell–Lorenz Observatory \| \|Sewanee, Tennessee, US
bgcolor=#CCCCCC \|COROT \|2006 \|Polar orbit
Cosmic Background Imager (CBI) (defunct) \|1999 \|Llano de Chajnantor Observatory, Chile
Côte d'Azur Observatory \|1988 \|France
Crane Observatory \| \|Topeka, Kansas, US
Crawford Observatory \|1880 \|Cork, Ireland
Creighton University Observatory (defunct) \|1886–1955 \|Omaha, Nebraska, US
Crimean Astrophysical Observatory \|1945 \|Nauchnyi, Crimea
Črni Vrh Observatory \|1975 \|Idrija, Slovenia
Cupillari Observatory \| \|La Plume, Pennsylvania, US
Custer Observatory \|1927 \|Southold, New York, US
[http://thecyprusplanetarium.com/ The Cyprus Planetarium] & Observatory \|2023 \|Nicosia, Cyprus
Daniel S. Schanck Observatory (defunct) \|1865 \|Rutgers University, New Brunswick, New Jersey, US
Daniel Scholl Observatory (defunct) \|1886–1966 \|Lancaster, Pennsylvania, US
Daocheng Solar Radio Telescope \|2022 \|Daocheng County, Garze Tibetan Autonomous Prefecture, Sichuan Province, China.
Dark Sky Observatory \|1981 \|Phillips Gap, Wilkes County, North Carolina, US
bgcolor=#CCCCCC \|Dark Matter Particle Explorer (DAMPE) \|2015 \|500 km LEO
Darling's Observatory (defunct) \|1917 \|Duluth, Minnesota, US
Dearborn Observatory \|1889 \|Evanston, Illinois, US
Detroit Observatory \|1854 \|Ann Arbor, Michigan, US
David Dunlap Observatory \|1935 \|Richmond Hill, Ontario, Canada
Dome C \| \|Antarctica
Dominion Observatory \|1905 \|Ottawa, Ontario, Canada
Dominion Astrophysical Observatory \|1918 \|Saanich, British Columbia, Canada
bgcolor=#99CC99 \|Dominion Radio Astrophysical Observatory \|1960 \|Kaleden, British Columbia, Canada
Dunsink Observatory \|1785 \|Dublin, Ireland
Durham University Observatory \|1839 \|Durham, UK
Dyer Observatory \|1953 \|Brentwood, Tennessee, US
bgcolor=#99CC99 \|Effelsberg 100-m Radio Telescope \|1972 \|Bonn, Germany
Ege University Observatory \|1965 \|Kemalpaşa, İzmir, Turkey
bgcolor=#CCCCCC \|Einstein Probe \|2024 \|Low Earth orbit
bgcolor=#CCCCCC \|Einstein Observatory (defunct) \|1978 \|Low Earth orbit
Elginfield Observatory \|1969 \|Middlesex Centre, Ontario, Canada
[https://web.archive.org/web/20180513183657/http://sterlinghillminingmuseum.org/whatshere/ellis.php Ellis Observatory] \|2004 \|Sterling Hill Mining Museum, Ogdensburg, New Jersey, US
Embry-Riddle Observatory \|2005 \|Daytona Beach, Florida, US
Entoto Observatory Space Science Research Center \|2012 \|Mount Entoto, Ethiopia
Eskdalemuir Observatory \|1908 \|Dumfries and Galloway, Scotland, UK
bgcolor=#CCCCCC \|Euclid Telescope \|2023 \|Earth–Sun {{L2}} Lagrangian point
European Southern Observatory :La Silla Observatory :New Technology Telescope :Llano de Chajnantor Observatory :Very Large Telescope :Paranal Observatory :European Extremely Large Telescope \|1962 1969 1989 2005 1998 1999 2026 \|Atacama Desert, Chile
Fabra Observatory \|1906 \|Barcelona, Spain
Fan Mountain Observatory \|1966 \|Albemarle County, Virginia, US
bgcolor=#99CC99 \|Five-hundred-meter Aperture Spherical Radio Telescope \|2013 \|Duyun, Pingtang County, Guizhou Province, China
Félix Aguilar Observatory \|1965 \|San Juan, Argentina
Fernbank Observatory \| \|Atlanta, Georgia, US
bgcolor=#CCCCCC \|Fermi Gamma-ray Space Telescope \|2008 \|Low Earth orbit
Fick Observatory \|1966 \|Boone, Iowa, US
Five College Radio Astronomy Observatory (defunct) \|1976–2011 \|New Salem, Massachusetts, US
Flarestar Observatory \| \|San Gwann, Malta
Foggy Bottom Observatory \|1951 \|Hamilton, New York, US
Foothill Observatory \| \|Los Altos Hills, California, US
Ford Observatory \|1998 \|Ithaca, New York, US
Fox Observatory \| \|Sunrise, Florida, US
Fox Park Public Observatory \|1999 \|Potterville, Michigan, US
Francis Marion University Observatory \|1982 \|Florence, South Carolina, US
Fred Lawrence Whipple Observatory \|1968 \|Mount Hopkins, Arizona, US
Fremont Peak Observatory \|1986 \|San Juan Bautista, California, US
Frosty Drew Observatory \|1980s \|Charlestown, Rhode Island, US
Fuertes Observatory \|1917 \|Ithaca, New York, US
bgcolor=#CCCCCC \|Galaxy Evolution Explorer (GALEX) \|2003 \|Caltech, Jet Propulsion Laboratory, California, US
bgcolor=#99CC99 \|Gaocheng Astronomical Observatory \|1276 \|Dengfeng, Henan, China
bgcolor=#99CC99 \|Gauribidanur Radio Observatory \|1976 \|Gauribidanur, Karnataka, India
Gemini Observatory \|1999 \| Southern Operations Center: La Serena, Chile; Northern Operations Center: Hilo, Hawaii, US
George Observatory \|1989 \| Brazos Bend State Park, near Houston, Texas, US
bgcolor=#99CC99 \|Giant Meterwave Radio Telescope (GMRT) \|1995 \|Pune, Maharashtra, India
Gifford Observatory \|1912 \|Wellington, New Zealand
Girawali Observatory \|2006 \|Pune, Maharashtra, India
Glen D. Riley Observatory \|1973 \|Naperville, Illinois, US
Godlee Observatory \|1902 \|Manchester, England, UK
Goodsell Observatory \|1887 \|Northfield, Minnesota, US
Goethe Link Observatory \|1939 \|Brooklyn, Indiana, US
Goldendale Observatory \|1973 \|Goldendale, Washington, US
Gornergrat (HFSJG) (defunct) \| 1967–2005 \| Gornergrat, Switzerland
bgcolor=#CCCCCC \|Granat (defunct) \|1989–1999 \|Highly eccentric Earth orbit
Gran Telescopio Canarias \|2006 \|Canary Islands, Spain
Grant O. Gale Observatory \|1984 \|Grinnell, Iowa, US
bgcolor=#99CC99 \|Green Bank Telescope \| \|Green Bank, West Virginia, US
Green Point Observatory \|1961 \|Sutherland, New South Wales, Australia
Grenfell Observatory \|2012 \|Corner Brook, Newfoundland and Labrador, Canada
Griffith Observatory \|1935 \|Los Angeles, California, US
Guillermo Haro Observatory \|1972 \|Cananea, Sonora, Mexico
Gyarah Sidi \| \|Agra, Uttar Pradesh, India
bgcolor=#CCCCCC \|HALCA (defunct) \|1997–2005 \|Elliptical Earth-centered orbit
Haleakala Observatory \| \|Maui, Hawaii, US
Halley Observatory \|1987 \|Heesch, Netherlands
Hamburg Observatory \|1803 \|Hamburg, Germany
bgcolor=#99CC99 \|Hat Creek Radio Observatory \|1950s \|Shasta County, California, US
Hard Labor Creek Observatory \| \|Atlanta, Georgia, US
bgcolor=#CCCCCC \|Space Hard X-Ray Modulation Telescope (HXMT) \|2017 \|550 km LEO
Hartung–Boothroyd Observatory \|1974 \|Ithaca, New York, US
bgcolor=#99CC99 \|Hartebeesthoek Radio Astronomy Observatory \|1961 \|Gauteng, South Africa
Hartwell House \|1831 \|Hartwell, Buckinghamshire, UK
Harvard College Observatory \|1839 \|Cambridge, Massachusetts, US
Haute-Provence Observatory \|1937 \|Alpes-de-Haute-Provence, France
Haystack Observatory \|1964 \|Westford, Massachusetts, US
Hector J Robinson Observatory \|1964 \|Lincoln Park, Michigan, US
bgcolor=#FFCC66 \|Helium and Lead Observatory \|2012 \|Sudbury, Ontario, Canada
Helmos Observatory \|2007 \|Mount Helmos, Greece
Helsinki University Observatory \|1834 \|Helsinki/Kirkkonummi, Finland
Herrett Observatory \|2004 \|Twin Falls, Idaho, US
bgcolor=#CCCCCC \|Herschel Space Observatory \|2009 \|Earth–Sun L2 point
Hidden Valley Observatory \|1960s \|Rapid City, South Dakota, US
bgcolor=#FFFF99 \|Hida Observatory, Kyoto University{{cite web \|title=Astronomical Observatory, Kyoto University \|url=https://www.kwasan.kyoto-u.ac.jp/index_en.html \|website=www.kwasan.kyoto-u.ac.jp \|access-date=13 November 2024 \|archive-url=https://web.archive.org/web/20190329105408/https://www.kwasan.kyoto-u.ac.jp/index_en.html \|archive-date=2019-03-29 \|language=en}} \|1968 \|Takayama, Gifu, Japan
Heyden Observatory, Georgetown University \|1844 \|Washington, D.C., US
bgcolor=#FFCC00 \|High Altitude Water Cherenkov Observatory \|2015 \|Sierra Negra, Puebla, Mexico
bgcolor=#FFCC00 \|High Energy Stereoscopic System \|2002 \|Khomas Region, Namibia
Highland Road Park Observatory \|1997 \|Baton Rouge, Louisiana, US
bgcolor=#CCCCCC \|Hinode \|2006 \|Low Earth orbit
Hirsch Observatory \|1942 \|Troy, New York, US
Hobbs Observatory \|1974 \|Fall Creek, Wisconsin, US
Hoher List Observatory \|1954 \|Daun, Germany
Holcomb Observatory and Planetarium \|1954 \|Indianapolis, Indiana, US
Hong Kong Observatory \|1883 \|Tsim Sha Tsui, Kowloon, Hong Kong
Hoober Observatory \|1993 \|Rotherham, UK
Hopkins Observatory \|1838 \|Williamstown, Massachusetts, US
Howell Observatory \| \|Starkville, Mississippi, US
Hradec Králové Observatory \|1961 \|Hradec Králové, Czech Republic
bgcolor=#FFFF99 \|Huairou Solar Observing Station \| \|Beijing, China
bgcolor=#CCCCCC \|Hubble Space Telescope \|1990 \|Low Earth orbit
Huggins Observatory defunct \|1856 \|London, England, UK
Hume Cronyn Memorial Observatory \|1940 \|London, Ontario, Canada
Hyde Memorial Observatory \|1977 \|Lincoln, Nebraska, US
bgcolor=#FFCC66 \|IceCube Neutrino Observatory \|2010 \|Amundsen–Scott South Pole Station, Antarctica
Indian Astronomical Observatory \|2001 \|Hanle, Ladakh, India
[https://www.humbleisd.net/page/insperity-humble-isd-observatory Insperity Observatory] \|2008 \|Humble, Texas, US
Instituto de Astrofísica de Canarias \|1975 \|Canary Islands, Spain
bgcolor=#CCCCCC \|INTEGRAL \|2002 \|Highly eccentric Earth orbit
bgcolor=#CCCCCC \|Infrared Astronomical Satellite (IRAS) (defunct) \|January–November 1983 \|Earth orbit
bgcolor=#CCCCCC \|Infrared Space Observatory (ISO) (defunct) \|1995–1998 \|Earth orbit
Innsbruck Observatory \| \|Innsbruck, Austria
bgcolor=#99CC99 \|IRAM 30m telescope \|1984 \|Pico Veleta, Spain
bgcolor=#99CC99 \|IRAM Plateau de Bure Interferometer \|1988 \|Gap, Hautes-Alpes, France
Iranian National Observatory \|2017 \|Mount Gargash, Iran
Isaac Newton Group of Telescopes \|1979 \|La Palma, Spain
Isaac Roberts' Observatory (defunct) \|1890 \|Crowborough, UK
Iso-Heikkilä Observatory (defunct) \|1935 (only amateur use since 1972) \|Turku, Finland
Constantinople Observatory of Taqi ad-Din \|1577 \|Constantinople, Turkey
Istanbul University Observatory \|1936 \|Istanbul, Turkey
Istituto Ricerche Solari Locarno, IRSOL \|1960 \|Locarno, Switzerland
bgcolor=#CCCCCC \|IXPE \|2021 \|Earth orbit
bgcolor=#FFFFFF \|Jack C. Davis Observatory \|2002 \|Carson City, Nevada, US
Astronomical Observatory of the Jagiellonian University \|1792 \|Kraków, Poland
bgcolor=#00FF00 \|James Clerk Maxwell Telescope \|1987 \|Mauna Kea, Hawaii, US
James Gregory Telescope \|1962 \|St. Andrews, UK
bgcolor=#CCCCCC \|James Webb Space Telescope \|2021 \|Earth–Sun {{L2}} Lagrangian point
James Wylie Shepherd Observatory \|2009 \|Montevallo, Alabama, US
Jakarta Observatory \|1968 \|Jakarta, Indonesia
Jantar Mantar \|1727 \|Jaipur, Rajasthan, India
Jena Observatory \|1962 \|Jena, Germany
Jewett Observatory \|1953 \|Pullman, Washington, US
bgcolor=#99CC99 \|Jodrell Bank Observatory \|1945 \|Cheshire, England, UK
JAC Johor Astronomy \|2014 \|Johor, Malaysia
Jones Observatory \|1936 \|Chattanooga, Tennessee, US
Jordan Hall of Science \|2006 \|Notre Dame, Indiana, US
Judson B. Coit Observatory \| \|Boston, Massachusetts, US
bgcolor=#99CC99 \|KAIRA \|2011 \|Kilpisjarvi, Finland
Khajeh Nasiredin Observatory \|~1980 \| Tabriz University, Tabriz, Iran
bgcolor=#FFCC66 \|Kamioka Observatory \|1983 \|Hida, Gifu, Japan
bgcolor=#FFFF99 \|Kanzelhoehe Solar Observatory \|1943 \|Villach, Austria
Karl Schwarzschild Observatory \|1960 \|Jena, Germany
Keck Observatory \|1993 \|Mauna Kea, Hawaii, US
Keeble Observatory \|1963 \|Ashland, Virginia, US
Keele [http://www.keele.ac.uk/observatory Observatory] \|1962 \|Keele University, England, UK
Kennon Observatory \|1939 \|Oxford, Mississippi, US
bgcolor=#CCCCCC \|Kepler Space Observatory \|2009 \|Earth-trailing heliocentric orbit
Kevola Observatory \|1963 \|Kevola, Finland
Kielder Observatory \|2008 \|Kielder Forest, Northumberland, England, UK
King's Observatory (defunct) \|1769 \|Greater London, England, UK
Kirkwood Observatory \|1901 \|Bloomington, Indiana, US
Kitami Observatory \|1987 \|Hokkaidō, Japan
Kitt Peak National Observatory \|1958 \|Tucson, Arizona, US
Kleť Observatory \|1957 \|České Budějovice, Czech Republic
bgcolor=#FFFF99 \|Kodaikanal Solar Observatory \|1899 \|Palani, Tamil Nadu, India
Konkoly Observatory \|1871 \|Budapest, Hungary
Kopernik Observatory & Science Center \|1974 \|Vestal, New York, US
bgcolor=#00FF00 \|KOSMA observatory \|1985–2010 \|Gornergrat, Switzerland
Kottamia Astronomical Observatory \| 1964 \| Cairo Governorate, Egypt
Kryoneri Observatory \| 1972 \| Mount Kyllini, Greece
Kuffner observatory \| 1884 \| Vienna, Austria
bgcolor=#00FFFF \|Kuiper Airborne Observatory (retired) \|1974 \|14 km in the stratosphere
Kwasan Observatory, Kyoto University{{cite web \|title=Astronomical Observatory, Kyoto University \|url=https://www.kwasan.kyoto-u.ac.jp/index_en.html \|website=www.kwasan.kyoto-u.ac.jp \|archive-url=https://web.archive.org/web/20190329105408/https://www.kwasan.kyoto-u.ac.jp/index_en.html \|archive-date=2019-03-29 \|language=en}} \| 1929 \| Kyoto, Japan
bgcolor=#ffffff \|Kvistaberg Observatory \|1948 \|Bro, Sweden
Kyung Hee Observatory \|1992 \|Seoul, South Korea
Laboratoire d'Astrophysique de Grenoble \|2001 \|Grenoble, France
Observatorio de La Cañada (La Cañada Observatory) \|2002 \|Ávila, Spain
Ladd Observatory \|1891 \|Providence, Rhode Island, US
Lake Afton Public Observatory \|1979 \|Wichita, Kansas, US
Lamont–Hussey Observatory (defunct) \|1928 \|Bloemfontein, South Africa
Landessternwarte Heidelberg-Königstuhl \|1898 \|Königstuhl, Heidelberg, Germany
Landolt Astronomical Observatory \|1939{{Cite web \|date=September 1, 2022 \|title=History of the Landolt Astronomical Observatory \|url=https://www.lsu.edu/physics/about/landolt.php \|access-date=September 1, 2022 \|publisher=Louisiana State University Department of Physics & Astronomy}} \|Baton Rouge, Louisiana, US
La Plata Astronomical Observatory \|1883 \|La Plata, Argentina
La Silla Observatory \|1969 \|Atacama Desert, Chile
bgcolor=#FFCC00 \|Large High Altitude Air Shower Observatory (LHAASO) \|2019 \|Daocheng County, Sichuan, China
Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) \|2009 \|Xinglong Station, Hebei, China
Large Millimeter Telescope \| \|Sierra Negra, Puebla, Mexico
Las Brisas Observatory \|1979 \|Colorado, US
Las Campanas Observatory \| \|La Serena, Chile
Langkawi National Observatory \|2012 \|Langkawi Island, Malaysia
Las Cumbres Observatory Global Telescope \|2005 \|Global network
Laws Observatory \|1880 \|Columbia, Missouri, US
Leander McCormick Observatory \|1885 \|Mount Jefferson, Charlottesville, Virginia, US
Lee Observatory \|1873 \|American University of Beirut, Beirut, Lebanon
Leiden Observatory \|1633 \|Leiden University, Leiden, Netherlands
Leipzig Observatory \| \|Leipzig, Germany
Leoncito Astronomical Complex \|1986 \|Calingasta, San Juan, Argentina
Levenhagen Observatory \| \|Seattle, Washington, US
Lick Observatory \|1881 \|Mount Hamilton, San Jose, California, US
LightBuckets (commercial observatory) \|2007 \|Rodeo, New Mexico, US
bgcolor=#0000A0 \|LIGO \|{{white\|1999}} \|Hanford Site & Livingston, Louisiana, US
Lindheimer Astrophysical Research Center (defunct) \|1966–1995 \|Evanston, Illinois, US
-bgcolor=#00FF00 \|Llano de Chajnantor Observatory \|2005 \|Atacama Desert, Chile
Llano del Hato National Astronomical Observatory \|1975 \|Mérida, Venezuela
bgcolor=#99CC99 \| Lockyer Technology Centre \| 2010 \| Sidmouth, Devon, England, UK
bgcolor=#99CC99 \|Long Wavelength Array \|2010 \|Socorro, New Mexico, US
Longa Vista Observatory \|2010 \|Itatiba, SP, Brazil
Lowell Observatory :*Anderson Mesa Station \|1894 1959 \|Flagstaff, Arizona, US
Lucknow (King of Oudh's) Observatory \|1832–1848 \|Lucknow, India
Lulin Observatory \|1999 \|Mount Lulin, Taiwan
Lund Observatory \|1749 \|Lund, Sweden
bgcolor=#FFCC00 \|Luoxue Mountain Cosmic Rays Research Center \|1953 \|Luoxue Mountain, Yunnan Province, China
Lyon Observatory \|1878 \|Saint-Genis-Laval, France
Macalester College Observatory \| \|Saint Paul, Minnesota, US
Macfarlane Observatory defunct \|1757 \|Glasgow, Scotland, UK
Magdalena Ridge Observatory Magdalena Ridge Observatory Single Telescope Magdalena Ridge Observatory Interferometer \|2006 2008 Under construction \|Socorro County, New Mexico, US
Majorca Observatory \|1991 \|Majorca, Spain
Malakoff Tower \|1845 \|Recife, Brazil
Manastash Ridge Observatory \|1972 \|Ellensburg, Washington, US
Manuel Foster Observatory (defunct) \|1903 \|Santiago, Chile
Maragheh Observatory \|1259 \|Maragheh, Iran
Margaret M. Jacoby Observatory \|1978 \|Warwick, Rhode Island, US
Maria Mitchell Observatory \|1908 \|Nantucket, Massachusetts, US
Marina Towers Observatory (Not In Use) \|1989 \|Maritime Quarter, Swansea, Wales, UK
Markree Observatory (defunct) \|1837 \|County Sligo, Ireland
Marseille Observatory \| \|Marseille, France
Martz Observatory \| \|Chautauqua County, New York, US
Mauna Kea Observatory \|1967 \|Mauna Kea, Hawaii, US
bgcolor=#FFFF99 \|Mauna Loa Solar Observatory \| \|Hawaii, US
Maynard F. Jordan Observatory \|1901 \|Orono, Maine, US
McDonald Observatory \| \|Davis Mountains, Texas, US
McKim Observatory \|1884 \|Greencastle, Indiana, US
bgcolor=#FFFF99 \|McMath–Hulbert Solar Observatory \|1930 \|Lake Angelus, Michigan, US
MDM Observatory \| \|Kitt Peak, Arizona, US
Mead Observatory \|2001 \|Columbus, Georgia, US
Medicina Radio Observatory \|1965 \|Medicina, Bologna, Italy
Mees Observatory \| \|Rochester, New York, US
Mehalso Observatory \| \|Erie, Pennsylvania, US
Melbourne Observatory \|1862 \|Melbourne, Victoria, Australia
Melton Memorial Observatory \|1928 \|Columbia, South Carolina, US
Mendenhall Observatory \|2002 \|Stillwater, Oklahoma, US
Menke Observatory \|1994 \|Davenport, Iowa, US
bgcolor=#99CC99 \|Metsähovi Observatory \|1966 \|Kirkkonummi, Finland
bgcolor=#FFFF99 \|Meudon Observatory \|1876 \|Meudon, France
Meyer–Womble Observatory \|1996 \|Mount Evans, Colorado, US
Michigan State University Observatory \|1969 \|East Lansing, Michigan, US
Observatoire Midi-Pyrénées :Pic du Midi Observatory :Toulouse Observatory \| :1878 :1733 \|Headquarters: Toulouse, France Pyrenees, France Toulouse, France
bgcolor=#FFCC00 \|Milagro \|1999 \|Los Alamos, New Mexico, US
Miller Observatory \|1976 \|Maiden, North Carolina, US
Mills Observatory \|1938 \|Dundee, Scotland, UK
[https://www.mindseyeobservatory.org Mind's Eye Observatory IAU W42] \|2018 \|Sebastian, Florida, US
MMT Observatory \|1979 \|Mount Hopkins, Arizona, US
Modine-Benstead Observatory \|1963 \|Union Grove, Wisconsin, US
Modra Observatory \|1988 \|Modra, Slovakia
Mohr Observatory (demolished) \|1765–1780 \|Jakarta, Indonesia
Moletai Astronomical Observatory \|1969 \|Moletai, Lithuania
Molonglo Observatory Synthesis Telescope (MOST) \|1960 \|Bungendore, New South Wales, Australia
Mont Mégantic Observatory \|1978 \|Mont Mégantic, Québec, Canada
Monterey Institute for Research in Astronomy (Oliver Observing Station) \|1972 (1984) \| Chews Ridge, California & Monterey, California, US
Montevideo National Observatory \| \|Montevideo, Uruguay, {{Coord\|34\|54.6\|S\|56\|12.8\|W}}
Moore Observatory \|1978 \|Oldham County, Kentucky, US
Morgan–Monroe Observatory \|1966 \|Morgan–Monroe State Forest, Indiana, US
Morris Observatory \|1973 \|North Manchester, Indiana, US
Morrison Observatory \| \|Fayette, Missouri, US
bgcolor=#FFCC00 \|Moscow Cosmic-Ray Station \| \|Troitsk, Russia
Mount Stony Brook Observatory \|1968 \|Stony Brook, New York, US
Mounds Observatory \| \|Tulsa, Oklahoma, US
Mount Abu InfraRed Observatory \|1995 \|Mount Abu, Rajasthan, India
Mount Burnett Observatory \|1972 \|Mount Burnett, Victoria, Australia
Mount Cuba Astronomical Observatory \| \|Greenville, Delaware, US
Mount Graham International Observatory \|1993 \|Mount Graham, Arizona, US
Mount John University Observatory \|1965 \|Lake Tekapo, South Island, New Zealand
Mount Laguna Observatory \|1968 \|San Diego, California, US
Mount Lemmon Observatory \| \|Tucson, Arizona, US
bgcolor=#99CC99 \|Mount Pleasant Radio Observatory \| \|Tasmania, Australia
Mount Stromlo Observatory \|1911 \|Canberra, Australia
Mount Suhora Observatory \|1987 \|Gorce Mountains, Poland
Mount Wilson Observatory \|1904 \|Mount Wilson, Los Angeles County, California, US
Mountain Skies Observatory \|1997 \|Lyman, Wyoming, US
bgcolor=#99CC99 \|Mullard Radio Astronomy Observatory \|1957 \|Cambridge, England, UK
bgcolor=#99CC99 \|Murchison Radio-astronomy Observatory \|2012 \|Murchison, Western Australia, Australia
Mykolaiv Astronomical Observatory \|1821 \|Mykolaiv, Mykolaiv Oblast, Ukraine
Nachi-Katsuura Observatory \| \|Nachikatsuura, Wakayama, Japan
bgcolor=#99CC99 \|Nançay Radio Telescope \|1965 \|Nançay, France
Nanjing Astronomical Instruments Research Centre \|1958 \|Nanjing, Jiangsu Province, China
National Astronomical Observatory (Colombia) \|1803 \|Bogotá, Colombia
National Astronomical Observatory of Japan \|1988 \|Headquarters: Mitaka, Tokyo, Japan
National Astronomical Observatory (Mexico) \|1967 \|Sierra San Pedro Mártir, Baja California, Mexico
National Observatory (Brazil) \|1827 \|Rio de Janeiro, Brazil
National Observatory of Athens \|1842 \|Athens, Greece
National Optical Astronomy Observatory :Cerro Tololo Inter-American Observatory :Gemini Observatory :Kitt Peak National Observatory :National Solar Observatory \|1982 \|Headquarters: Tucson, Arizona, US
National Optical Observatory \| \|Turkey
bgcolor=#99CC99 \|National Radio Astronomy Observatory :Atacama Large Millimeter Array :Green Bank Telescope :Very Large Array :Very Long Baseline Array \|1957 \|Headquarters: Charlottesville, Virginia, US
National Research Institute of Astronomy and Geophysics (NRIAG) \|1903 \|Helwan, Egypt
bgcolor=#FFFF99 \|National Solar Observatory \|1952 \|Sunspot, New Mexico, US & Kitt Peak, Arizona, US
Naval Research Lab. Radio Sta. \| \|Sugar Grove, West Virginia, US {{Coord\|38\|31.2\|N\|79\|16.4\|W}}
Naylor Observatory \|1971 \|Harrisburg, Pennsylvania, US
Neuchâtel Observatory \|1858 \|Neuchâtel, Switzerland
Nha Trang Observatory \|2017 \|Nha Trang, Vietnam
Nice Observatory \|1879 \|Nice, France
Nieuwland Hall (Napoleon III Telescope) \|1959 \|Notre Dame, Indiana, US
Nizamia Observatory \|1907 \|Hyderabad, India
Nordic Optical Telescope \| 1988 \| Canary Islands, Spain
bgcolor=#FFCC00 \|Norilsk Cosmic-Ray Station \| \|Norilsk, Krasnoyarsk Krai, Russia
Norman Lockyer Observatory \|1912 \|Sidmouth, UK
Northern Arizona University Observatory \| \|Flagstaff, Arizona, US
Northern Skies Observatory \|2009 \|Peacham, Vermont, US
Northolt Branch Observatory \|2015 \|London, England, UK
Northolt Branch Observatory 2, Shepherd's Bush \|2016 \|London, England, UK
Northolt Branch Observatory 3, Blandford Forum \|2017 \|London, England, UK
North Georgia Astronomical Observatory \| \|Dahlonega, Georgia, US
North Otago Astronomical Society Observatory \| \|Oamaru, South Island, New Zealand
Nyrölä Observatory \|1997 \|Jyväskylän maalaiskunta, Western Finland Province, Finland
OAC (Observatorio Astronómico de Córdoba) \|1871 \|Córdoba, Argentina
OAO (Observatorio de Aras de los Olmos) \|2008 \|Aras de los Olmos, Valencia, Spain
O'Brien Observatory \|1961 \|Marine on St. Croix, Minnesota, US
[http://www.astroqueyras.com/ Observatoire du Pic de Château-Renard] \|1974 \|Saint-Véran, France
[https://web.archive.org/web/20080511173449/http://www.observatorio.unal.edu.co/ Observatorio Astronómico Nacional (Colombia)] \|1803 \|Bogotá, Colombia
Observatorio Astronomico Nacional Tonantzintla \|1961 \|Tonantzintla, Mexico
Observatorio Solar Carl Sagan \|2000 \|Hermosillo, Sonora, Mexico
Observatory House (defunct) \|1789 \|Slough, UK
Observatory of the rue Serpente (defunct) \|1890–1968 \|Paris, France
Oil Region Astronomical Observatory \| \|Venango County, Pennsylvania, US
Onan Observatory \|1990 \|Norwood Young America, Minnesota, US
Ondokuz Mayıs University Observatory \|2006 \|Samsun, Turkey
Ondřejov Observatory \|1898 \|Ondřejov, Czech Republic
bgcolor=#99CC99 \|Onsala Space Observatory \|1949 \|Onsala, Sweden
bgcolor=#99CC99 \|Ooty Radio Telescope \|1970 \|Ooty, Tamil Nadu, India
Orchard Hill Observatory \|1965 \|Amherst, Massachusetts, US
Orioloromano Observatory \|2007 \|Oriolo Romano, Italy
bgcolor=#CCCCCC \|Orion 1 (defunct) \|1971 \|Low Earth orbit
bgcolor=#CCCCCC \|Orion 2 (defunct) \|1973 \|Low Earth orbit
Orion Ranch Observatory \|2009 \|Bertram, Texas, US
Orwell Park School Observatory \|1848 \|Nacton, UK
Ostrowik Observatory \|1952 \|Ostrowik, Poland
Otter Creek Observatory \|1995 \|Meade County, Kentucky, US
bgcolor=#FFCC00 \|Oulu Cosmic-Ray Station \| \|Oulu, Finland
bgcolor=#99CC99 \|Owens Valley Radio Observatory \|1958 \|Bishop, California, US
Pachmarhi Array of Cerenkov Telescopes (PACT) \|1986 \|Pachmarhi, Madhya Pradesh, India
Palisades-Dows Observatory \|1987 \|Cedar Rapids, Iowa, US
PAGASA Astronomical Observatory \|1954 \|Quezon City, Philippines
Palermo Observatory \|1790 \|Palermo, Sicily, Italy
Palomar Observatory \|1948 \|Palomar Mountain, California, US
Panzano Observatory \|1640 \|Bologna, Italy
Paranal Observatory \|1999 \|Cerro Paranal, Atacama Desert, Chile
Paris Observatory \|1667 \|Paris, France
bgcolor=#99CC99 \|Parkes Observatory \|1961 \|Parkes, Australia
Paul Robinson Observatory \|1965 \|High Bridge, New Jersey, US
Peach Mountain Observatory \|1950 \|Dexter, Michigan, US
Penteli Observatory \|1937 \|Penteli, Attica, Greece
Perkins Observatory \|1931 \|Delaware, Ohio, US
Perth Observatory \|1896 \|Perth, Australia
Peterberg Observatory \|1977	Saarland, Germany
Pic du Midi Observatory \|1878 \|Pic du Midi, Pyrenees, France
Pico dos Dias Observatory \|1981 \|Minas Gerais, Brazil
Piera Observatory \|1968 \|Barcelona, Spain
bgcolor=#FFCC00 \|Pierre Auger Observatory \|2004 \|Malargüe, Argentina
Pine Bluff Observatory \|1958 \|Cross Plains, Wisconsin, US

class="wikitable sortable sticky-header"

width="40%" |Name

! width="5%" |Established

! width="30%" |Location

Abastumani Astrophysical Observatory

|1932

|Abastumani, Georgia

Abu Reyhan-e Birooni Observatory

|1976

|Shiraz University, Shiraz, Iran

Adirondack Public Observatory

|Tupper Lake, New York, US

bgcolor=#CCCCCC

|Aditya-L1

|2023

|Sun-Earth L1

Adolphson Observatory

|2013

|Monmouth, Illinois, US

Airdrie Public Observatory

|1896

|Airdrie, Scotland, UK

Aker Observatory

|1995

|Safford, Arizona, US

Aldershot Observatory

|1906

|Aldershot, Hampshire, England, UK

bgcolor=#99CC99

|Algonquin Radio Observatory

|1959

|Algonquin Provincial Park, Ontario, Canada

Allegheny Observatory

|1859

|Pittsburgh, Pennsylvania, US

Ametlla de Mar Observatory

|1992

|l'Ametlla de Mar, Catalonia, Spain

bgcolor=#99CC99

|AMiBA

|2006

|Mauna Loa, Hawaii, US

Anderson Mesa Station

|1959

|Flagstaff, Arizona, US

Andrushivka Astronomical Observatory

|2001

|Andrushivka, Zhytomyr Oblast, Ukraine

Angell Hall Observatory

|1927

|Ann Arbor, Michigan, US

Ankara University Observatory

|1963

| Gölbaşı, Ankara, Turkey

bgcolor=#FFCC66

|Antarctic Muon and Neutrino Detector Array

|2002

|Antarctica

bgcolor=#00FF00

|Antarctic Submillimeter Telescope and Remote Observatory

|1994–2005

|Antarctica

bgcolor=#FFCC66

|ANTARES

|2008

|In the Mediterranean Sea near Toulon, France

[http://www.apache-sitgreaves.org/ Apache-Sitgreaves Observatory]

|2005

|Overgaard, Arizona, US

Apache Point Observatory

|1985

|Sunspot, New Mexico, US

bgcolor=#FFCC00

|Apatity Cosmic-Ray Station

|Apatity, Russia

Apollo Observatory

|1969

|Dayton, Ohio, US

Arcetri Observatory

|Arcetri, Florence, Italy

bgcolor=#99CC99

|Arecibo Observatory

|1963

|Arecibo, Puerto Rico, US

bgcolor=#99CC99

|Argentine Institute of Radio Astronomy

|1966

|Berazategui Partido, Buenos Aires Province, Argentina

Armagh Observatory

|1790

|Armagh, UK

Aryabhatta Research Institute of Observational Sciences

|1954

|Nainital, Uttarakhand, India

Ashton Observatory

|1983

|Baxter, Iowa, US

Asiago Astrophysical Observatory

|1942

|Asiago, Italy

Assheton Observatory

|1860

|Lancashire, UK

bgcolor=#CCCCCC

|Astron (defunct)

|1983–1989

|Highly eccentric Earth orbit

Astronomical Observatory Aurora

|2011

|Hechingen, Germany

Astronomical Observatory of Lisbon

|1867

|Lisbon, Portugal

Astronomy Centre

|1982

|Todmorden, England

Astronomy Tower of the Sorbonne

|1885–1909 (only for amateur use since 1980)

|Paris, France

Astrophysical Institute Potsdam

|1992

|Potsdam, Germany

bgcolor=#00FF00

|Atacama Pathfinder Experiment (APEX)

|2003

|Llano de Chajnantor Observatory, Chile

bgcolor=#99CC99

|Australia Telescope Compact Array

|1988

|Narrabri, Australia

Australian Astronomical Observatory

|1971

|Coonabarabran, Australia

Badlands Observatory

|2000

|Quinn, South Dakota, US

bgcolor=#FFCC66

|Baikal Deep Underwater Neutrino Telescope

|1993

|Baikal Lake, Russia

Bangladesh Astronomical Observatory{{cite web |title=Bangladesh Astronomical Observatory |url=http://bao.com.bd |archive-url=https://web.archive.org/web/20200609160318/http://bao.com.bd/ |archive-date=2020-06-09 }}

|2015

|Dhaka, Bangladesh

Baker Observatory

|1980

|Marshfield, Missouri, US

bgcolor=#FFCC66

|Baksan Neutrino Observatory

|1977

|Prielbrusye, Baksan Valley, Russia

Ball State University Observatory

|Muncie, Indiana, US

Barnard Observatory (defunct)

|1859

|Oxford, Mississippi, US

Bareket Observatory

|1990

|Maccabim, Israel

Barnett Observatory

|1960

|Chesterfield, England, UK

Bayfordbury Observatory

|1969

|Hertfordshire, England, UK

Behlen Observatory

|1972

|Mead, Nebraska, US

Beijing Astronomical Observatory

|1958

|Beijing, China

Beijing Ancient Observatory

|1442

|Beijing, China

Belgrade Observatory

|1887

|Belgrade, Serbia

Belogradchik Observatory

|1961

|Belogradchik, Bulgaria

Benito Loyola Observatory

|2024

|Virginia Beach, Virginia, US

Benmore Peak Observatory

|1996

|Mackenzie Basin, South Island, New Zealand

BeppoSAX (defunct)

|1996–2003

|Low Earth orbit

Bergisch Gladbach Observatory

|1995

|Bergisch Gladbach, Germany

Berlin Observatory

|1711

|Berlin, Germany

Besançon Observatory

|1882

|Besançon, France

Beverly-Begg Observatory

|1922

|Dunedin, South Island, New Zealand

Bidston Observatory

|1849

|Bidston, England, UK

bgcolor=#FFFF99

|Big Bear Lake Solar Observatory

|1969

|Big Bear City, California, US

Bisdee Tier Optical Astronomy Observatory

|2010

|Bisdee Tier, Spring Hill, Tasmania, Australia

Black Moshannon Observatory (defunct)

|1972

|Pennsylvania, US

Blackett Observatory

|1930s

|Wiltshire, England, UK

Blue Mesa Observatory (defunct)

|1967

|New Mexico, US

[http://members.westnet.com.au/~asnewcomputers/ Boambee Observatory]

|1987

|Boambee, New South Wales, Australia

Bohyunsan Optical Astronomy Observatory (BOAO)

|1996

| Youngchun, South Korea

BOOTES

|1985

|Spain

Bordeaux Observatory

|1878

|Floirac, France

Bosscha Observatory

|1923

|Lembang, West Java, Indonesia

Boswell Observatory (defunct)

|1883

|Crete, Nebraska, US

Bowman Observatory

|1940

|Greenwich, Connecticut, US

Boyden Observatory

|1889

|Bloemfontein, South Africa

Bradstreet Observatory

|1996

|St. Davids, Pennsylvania, US

Brackett Observatory

|1908

|Pomona College, Claremont, California, US{{cite web |title=Brackett Observatory |url=https://www.pomona.edu/academics/departments/physics-and-astronomy/facilities/brackett-observatory |website=Physics and Astronomy Department |publisher=Pomona College |access-date=13 November 2024 |language=en |date=18 January 2017}}{{cite journal

| title=The Frank P. Brackett Observatory Dedication

| journal=Popular Astronomy

| volume=17 | pages=14–19 | date=January 1909

| bibcode=1909PA.....17...14.}}

Bradley Observatory

|1950

|Decatur, Georgia, US

Braeside Observatory (defunct)

|1976

|Flagstaff, Arizona, US

Brera Observatory

|1764

|Milan, Italy

Bridgewater State University Observatory

|2012

|Bridgewater, Massachusetts, US

Brooks Observatory

|Toledo, Ohio, US

Brooks Astronomical Observatory

|1964

|Mount Pleasant, Michigan, US

Brorfelde Observatory

|1953

|Holbæk, Denmark

Bucharest Astronomical Observatory

|1910

|Bucharest, Romania

Bucknell Observatory

|Lewisburg, Pennsylvania, US

Burrell Memorial Observatory

|1940

|Berea, Ohio, US

Byurakan Observatory

|1946

|Mount Aragats, Armenia

Cagigal Observatory

|1888

|Caracas, Venezuela

Cagliari Observatory

|1899

|Cagliari, Sardinia, Italy

bgcolor=#FFFFFF

|Calais Observatory (defunct)

|1857

|Calais, Maine, US

Calar Alto Observatory

|1975

|Almería, Spain

-bgcolor=#00FF00

|Caltech Submillimeter Observatory (defunct)

|1986

|Mauna Kea, Hawaii, US

Cambridge Observatory

|1823

|Cambridge, UK

Camille Flammarion Observatory

|1883

|Juvisy-sur-Orge, France

Campbelltown Rotary Observatory

|2000

|Campbelltown, NSW, Australia

Campo Imperatore Near-Earth Object Survey

|2001

|Campo Imperatore, Italy

Canopus Hill Observatory

|Hobart, Tasmania, Australia

Capilla Peak Observatory

|1947

|Albuquerque, New Mexico, US

Capodimonte Observatory

|1812

|Naples, Italy

Carter Observatory

|1937

|Wellington, New Zealand

Catania Astrophysical Observatory

|Catania, Italy

Cawthron Atkinson Observatory

|1883

|Nelson, New Zealand

Celestial Observatory

|Russellville, Arkansas, US

Centennial Observatory

|2004

|Twin Falls, Idaho, US

Center for Astrophysics {{!}} Harvard & Smithsonian

|1973

|Cambridge, Massachusetts, US

Cerro Armazones Observatory

|1995

|Atacama Desert, Chile

Cerro Tololo Inter-American Observatory

|1962

|Atacama Desert, Chile

Cerro Pachón Observatory

|2000

|Atacama Desert, Chile

Chabot Space & Science Center

|1883

|Oakland, California, US

Chamberlin Observatory

|1890

|Denver, Colorado, US

Changchun Astronomical Observatory

|Changchun, Jilin Province, China

bgcolor=#CCCCCC

|Chandra X-ray Observatory

|1999

|Highly eccentric Earth orbit

Chianti Polifunctional Observatory

|2013

|San Donato in Poggio, Florence, Italy

Chico Community Observatory

|2001

|Chico, California, US

bgcolor=#99CC99

|Chilbolton Observatory

|1967

|Chilbolton, UK

Cima Ekar Observing Station

|1966

|Asiago, Italy

Cincinnati Observatory

|1843

|Cincinnati, Ohio, US

City Observatory, Edinburgh

|1818

|Edinburgh, Scotland, UK

Clarke Observatory

|1897 / 1923

|Dunkirk, New York / Alliance, Ohio, US

Class of 1951 Observatory

|1997

|Poughkeepsie, New York, US

Cloudcroft Observatory (defunct)

|1962

|New Mexico, US

Coats Observatory

|1883

|Paisley, Scotland, UK

Coit Observatory

|Boston, Massachusetts, US

Collins Observatory

|2003

|Corning, New York, US

Collm Observatory

|Leipzig, Germany

Colombo University Observatory

| 1920s

|Colombo, Sri Lanka

bgcolor=#CCCCCC

|Compton Gamma-Ray Observatory (defunct)

|1991–2000

|Low Earth orbit

bgcolor=#FFFFFF

|ÇOMÜ Ulupınar Observatory

|2002

|Çanakkale, Turkey

Concordia College Observatory

|Moorhead, Minnesota, US

Consell Observatory

|1987

|Majorca, Spain

Copenhagen University Observatory

|1861

|Copenhagen, Denmark

Cordell–Lorenz Observatory

|Sewanee, Tennessee, US

bgcolor=#CCCCCC

|COROT

|2006

|Polar orbit

Cosmic Background Imager (CBI) (defunct)

|1999

|Llano de Chajnantor Observatory, Chile

Côte d'Azur Observatory

|1988

|France

Crane Observatory

|Topeka, Kansas, US

Crawford Observatory

|1880

|Cork, Ireland

Creighton University Observatory (defunct)

|1886–1955

|Omaha, Nebraska, US

Crimean Astrophysical Observatory

|1945

|Nauchnyi, Crimea

Črni Vrh Observatory

|1975

|Idrija, Slovenia

Cupillari Observatory

|La Plume, Pennsylvania, US

Custer Observatory

|1927

|Southold, New York, US

[http://thecyprusplanetarium.com/ The Cyprus Planetarium] & Observatory

|2023

|Nicosia, Cyprus

Daniel S. Schanck Observatory (defunct)

|1865

|Rutgers University, New Brunswick, New Jersey, US

Daniel Scholl Observatory (defunct)

|1886–1966

|Lancaster, Pennsylvania, US

Daocheng Solar Radio Telescope

|2022

|Daocheng County, Garze Tibetan Autonomous Prefecture, Sichuan Province, China.

Dark Sky Observatory

|1981

|Phillips Gap, Wilkes County, North Carolina, US

bgcolor=#CCCCCC

|Dark Matter Particle Explorer (DAMPE)

|2015

|500 km LEO

Darling's Observatory (defunct)

|1917

|Duluth, Minnesota, US

Dearborn Observatory

|1889

|Evanston, Illinois, US

Detroit Observatory

|1854

|Ann Arbor, Michigan, US

David Dunlap Observatory

|1935

|Richmond Hill, Ontario, Canada

Dome C

|Antarctica

Dominion Observatory

|1905

|Ottawa, Ontario, Canada

Dominion Astrophysical Observatory

|1918

|Saanich, British Columbia, Canada

bgcolor=#99CC99

|Dominion Radio Astrophysical Observatory

|1960

|Kaleden, British Columbia, Canada

Dunsink Observatory

|1785

|Dublin, Ireland

Durham University Observatory

|1839

|Durham, UK

Dyer Observatory

|1953

|Brentwood, Tennessee, US

bgcolor=#99CC99

|Effelsberg 100-m Radio Telescope

|1972

|Bonn, Germany

Ege University Observatory

|1965

|Kemalpaşa, İzmir, Turkey

bgcolor=#CCCCCC

|Einstein Probe

|2024

|Low Earth orbit

bgcolor=#CCCCCC

|Einstein Observatory (defunct)

|1978

|Low Earth orbit

Elginfield Observatory

|1969

|Middlesex Centre, Ontario, Canada

[https://web.archive.org/web/20180513183657/http://sterlinghillminingmuseum.org/whatshere/ellis.php Ellis Observatory]

|2004

|Sterling Hill Mining Museum, Ogdensburg, New Jersey, US

Embry-Riddle Observatory

|2005

|Daytona Beach, Florida, US

Entoto Observatory Space Science Research Center

|2012

|Mount Entoto, Ethiopia

Eskdalemuir Observatory

|1908

|Dumfries and Galloway, Scotland, UK

bgcolor=#CCCCCC

|Euclid Telescope

|2023

|Earth–Sun {{L2}} Lagrangian point

European Southern Observatory

:*La Silla Observatory

:*New Technology Telescope

:*Llano de Chajnantor Observatory

:*Very Large Telescope

:*Paranal Observatory

:*European Extremely Large Telescope

|1962

1969
1989
2005
1998
1999
2026

|Atacama Desert, Chile

Fabra Observatory

|1906

|Barcelona, Spain

Fan Mountain Observatory

|1966

|Albemarle County, Virginia, US

bgcolor=#99CC99

|Five-hundred-meter Aperture Spherical Radio Telescope

|2013

|Duyun, Pingtang County, Guizhou Province, China

Félix Aguilar Observatory

|1965

|San Juan, Argentina

Fernbank Observatory

|Atlanta, Georgia, US

bgcolor=#CCCCCC

|Fermi Gamma-ray Space Telescope

|2008

|Low Earth orbit

Fick Observatory

|1966

|Boone, Iowa, US

Five College Radio Astronomy Observatory (defunct)

|1976–2011

|New Salem, Massachusetts, US

Flarestar Observatory

|San Gwann, Malta

Foggy Bottom Observatory

|1951

|Hamilton, New York, US

Foothill Observatory

|Los Altos Hills, California, US

Ford Observatory

|1998

|Ithaca, New York, US

Fox Observatory

|Sunrise, Florida, US

Fox Park Public Observatory

|1999

|Potterville, Michigan, US

Francis Marion University Observatory

|1982

|Florence, South Carolina, US

Fred Lawrence Whipple Observatory

|1968

|Mount Hopkins, Arizona, US

Fremont Peak Observatory

|1986

|San Juan Bautista, California, US

Frosty Drew Observatory

|1980s

|Charlestown, Rhode Island, US

Fuertes Observatory

|1917

|Ithaca, New York, US

bgcolor=#CCCCCC

|Galaxy Evolution Explorer (GALEX)

|2003

|Caltech, Jet Propulsion Laboratory, California, US

bgcolor=#99CC99

|Gaocheng Astronomical Observatory

|1276

|Dengfeng, Henan, China

bgcolor=#99CC99

|Gauribidanur Radio Observatory

|1976

|Gauribidanur, Karnataka, India

Gemini Observatory

|1999

| Southern Operations Center: La Serena, Chile; Northern Operations Center: Hilo, Hawaii, US

George Observatory

|1989

| Brazos Bend State Park, near Houston, Texas, US

bgcolor=#99CC99

|Giant Meterwave Radio Telescope (GMRT)

|1995

|Pune, Maharashtra, India

Gifford Observatory

|1912

|Wellington, New Zealand

Girawali Observatory

|2006

|Pune, Maharashtra, India

Glen D. Riley Observatory

|1973

|Naperville, Illinois, US

Godlee Observatory

|1902

|Manchester, England, UK

Goodsell Observatory

|1887

|Northfield, Minnesota, US

Goethe Link Observatory

|1939

|Brooklyn, Indiana, US

Goldendale Observatory

|1973

|Goldendale, Washington, US

Gornergrat (HFSJG) (defunct)

| 1967–2005

| Gornergrat, Switzerland

bgcolor=#CCCCCC

|Granat (defunct)

|1989–1999

|Highly eccentric Earth orbit

Gran Telescopio Canarias

|2006

|Canary Islands, Spain

Grant O. Gale Observatory

|1984

|Grinnell, Iowa, US

bgcolor=#99CC99

|Green Bank Telescope

|Green Bank, West Virginia, US

Green Point Observatory

|1961

|Sutherland, New South Wales, Australia

Grenfell Observatory

|2012

|Corner Brook, Newfoundland and Labrador, Canada

Griffith Observatory

|1935

|Los Angeles, California, US

Guillermo Haro Observatory

|1972

|Cananea, Sonora, Mexico

Gyarah Sidi

|Agra, Uttar Pradesh, India

bgcolor=#CCCCCC

|HALCA (defunct)

|1997–2005

|Elliptical Earth-centered orbit

Haleakala Observatory

|Maui, Hawaii, US

Halley Observatory

|1987

|Heesch, Netherlands

Hamburg Observatory

|1803

|Hamburg, Germany

bgcolor=#99CC99

|Hat Creek Radio Observatory

|1950s

|Shasta County, California, US

Hard Labor Creek Observatory

|Atlanta, Georgia, US

bgcolor=#CCCCCC

|Space Hard X-Ray Modulation Telescope (HXMT)

|2017

|550 km LEO

Hartung–Boothroyd Observatory

|1974

|Ithaca, New York, US

bgcolor=#99CC99

|Hartebeesthoek Radio Astronomy Observatory

|1961

|Gauteng, South Africa

Hartwell House

|1831

|Hartwell, Buckinghamshire, UK

Harvard College Observatory

|1839

|Cambridge, Massachusetts, US

Haute-Provence Observatory

|1937

|Alpes-de-Haute-Provence, France

Haystack Observatory

|1964

|Westford, Massachusetts, US

Hector J Robinson Observatory

|1964

|Lincoln Park, Michigan, US

bgcolor=#FFCC66

|Helium and Lead Observatory

|2012

|Sudbury, Ontario, Canada

Helmos Observatory

|2007

|Mount Helmos, Greece

Helsinki University Observatory

|1834

|Helsinki/Kirkkonummi, Finland

Herrett Observatory

|2004

|Twin Falls, Idaho, US

bgcolor=#CCCCCC

|Herschel Space Observatory

|2009

|Earth–Sun L2 point

Hidden Valley Observatory

|1960s

|Rapid City, South Dakota, US

bgcolor=#FFFF99

|Hida Observatory, Kyoto University{{cite web |title=Astronomical Observatory, Kyoto University |url=https://www.kwasan.kyoto-u.ac.jp/index_en.html |website=www.kwasan.kyoto-u.ac.jp |access-date=13 November 2024 |archive-url=https://web.archive.org/web/20190329105408/https://www.kwasan.kyoto-u.ac.jp/index_en.html |archive-date=2019-03-29 |language=en}}

|1968

|Takayama, Gifu, Japan

Heyden Observatory, Georgetown University

|1844

|Washington, D.C., US

bgcolor=#FFCC00

|High Altitude Water Cherenkov Observatory

|2015

|Sierra Negra, Puebla, Mexico

bgcolor=#FFCC00

|High Energy Stereoscopic System

|2002

|Khomas Region, Namibia

Highland Road Park Observatory

|1997

|Baton Rouge, Louisiana, US

bgcolor=#CCCCCC

|Hinode

|2006

|Low Earth orbit

Hirsch Observatory

|1942

|Troy, New York, US

Hobbs Observatory

|1974

|Fall Creek, Wisconsin, US

Hoher List Observatory

|1954

|Daun, Germany

Holcomb Observatory and Planetarium

|1954

|Indianapolis, Indiana, US

Hong Kong Observatory

|1883

|Tsim Sha Tsui, Kowloon, Hong Kong

Hoober Observatory

|1993

|Rotherham, UK

Hopkins Observatory

|1838

|Williamstown, Massachusetts, US

Howell Observatory

|Starkville, Mississippi, US

Hradec Králové Observatory

|1961

|Hradec Králové, Czech Republic

bgcolor=#FFFF99

|Huairou Solar Observing Station

|Beijing, China

bgcolor=#CCCCCC

|Hubble Space Telescope

|1990

|Low Earth orbit

Huggins Observatory defunct

|1856

|London, England, UK

Hume Cronyn Memorial Observatory

|1940

|London, Ontario, Canada

Hyde Memorial Observatory

|1977

|Lincoln, Nebraska, US

bgcolor=#FFCC66

|IceCube Neutrino Observatory

|2010

|Amundsen–Scott South Pole Station, Antarctica

Indian Astronomical Observatory

|2001

|Hanle, Ladakh, India

[https://www.humbleisd.net/page/insperity-humble-isd-observatory Insperity Observatory]

|2008

|Humble, Texas, US

Instituto de Astrofísica de Canarias

|1975

|Canary Islands, Spain

bgcolor=#CCCCCC

|INTEGRAL

|2002

|Highly eccentric Earth orbit

bgcolor=#CCCCCC

|Infrared Astronomical Satellite (IRAS) (defunct)

|January–November 1983

|Earth orbit

bgcolor=#CCCCCC

|Infrared Space Observatory (ISO) (defunct)

|1995–1998

|Earth orbit

Innsbruck Observatory

|Innsbruck, Austria

bgcolor=#99CC99

|IRAM 30m telescope

|1984

|Pico Veleta, Spain

bgcolor=#99CC99

|IRAM Plateau de Bure Interferometer

|1988

|Gap, Hautes-Alpes, France

Iranian National Observatory

|2017

|Mount Gargash, Iran

Isaac Newton Group of Telescopes

|1979

|La Palma, Spain

Isaac Roberts' Observatory (defunct)

|1890

|Crowborough, UK

Iso-Heikkilä Observatory (defunct)

|1935 (only amateur use since 1972)

|Turku, Finland

Constantinople Observatory of Taqi ad-Din

|1577

|Constantinople, Turkey

Istanbul University Observatory

|1936

|Istanbul, Turkey

Istituto Ricerche Solari Locarno, IRSOL

|1960

|Locarno, Switzerland

bgcolor=#CCCCCC

|IXPE

|2021

|Earth orbit

bgcolor=#FFFFFF

|Jack C. Davis Observatory

|2002

|Carson City, Nevada, US

Astronomical Observatory of the Jagiellonian University

|1792

|Kraków, Poland

bgcolor=#00FF00

|James Clerk Maxwell Telescope

|1987

|Mauna Kea, Hawaii, US

James Gregory Telescope

|1962

|St. Andrews, UK

bgcolor=#CCCCCC

|James Webb Space Telescope

|2021

|Earth–Sun {{L2}} Lagrangian point

James Wylie Shepherd Observatory

|2009

|Montevallo, Alabama, US

Jakarta Observatory

|1968

|Jakarta, Indonesia

Jantar Mantar

|1727

|Jaipur, Rajasthan, India

Jena Observatory

|1962

|Jena, Germany

Jewett Observatory

|1953

|Pullman, Washington, US

bgcolor=#99CC99

|Jodrell Bank Observatory

|1945

|Cheshire, England, UK

JAC Johor Astronomy

|2014

|Johor, Malaysia

Jones Observatory

|1936

|Chattanooga, Tennessee, US

Jordan Hall of Science

|2006

|Notre Dame, Indiana, US

Judson B. Coit Observatory

|Boston, Massachusetts, US

bgcolor=#99CC99

|KAIRA

|2011

|Kilpisjarvi, Finland

Khajeh Nasiredin Observatory

|~1980

| Tabriz University, Tabriz, Iran

bgcolor=#FFCC66

|Kamioka Observatory

|1983

|Hida, Gifu, Japan

bgcolor=#FFFF99

|Kanzelhoehe Solar Observatory

|1943

|Villach, Austria

Karl Schwarzschild Observatory

|1960

|Jena, Germany

Keck Observatory

|1993

|Mauna Kea, Hawaii, US

Keeble Observatory

|1963

|Ashland, Virginia, US

Keele [http://www.keele.ac.uk/observatory Observatory]

|1962

|Keele University, England, UK

Kennon Observatory

|1939

|Oxford, Mississippi, US

bgcolor=#CCCCCC

|Kepler Space Observatory

|2009

|Earth-trailing heliocentric orbit

Kevola Observatory

|1963

|Kevola, Finland

Kielder Observatory

|2008

|Kielder Forest, Northumberland, England, UK

King's Observatory (defunct)

|1769

|Greater London, England, UK

Kirkwood Observatory

|1901

|Bloomington, Indiana, US

Kitami Observatory

|1987

|Hokkaidō, Japan

Kitt Peak National Observatory

|1958

|Tucson, Arizona, US

Kleť Observatory

|1957

|České Budějovice, Czech Republic

bgcolor=#FFFF99

|Kodaikanal Solar Observatory

|1899

|Palani, Tamil Nadu, India

Konkoly Observatory

|1871

|Budapest, Hungary

Kopernik Observatory & Science Center

|1974

|Vestal, New York, US

bgcolor=#00FF00

|KOSMA observatory

|1985–2010

|Gornergrat, Switzerland

Kottamia Astronomical Observatory

| 1964

| Cairo Governorate, Egypt

Kryoneri Observatory

| 1972

| Mount Kyllini, Greece

Kuffner observatory

| 1884

| Vienna, Austria

bgcolor=#00FFFF

|Kuiper Airborne Observatory (retired)

|1974

|14 km in the stratosphere

Kwasan Observatory, Kyoto University{{cite web |title=Astronomical Observatory, Kyoto University |url=https://www.kwasan.kyoto-u.ac.jp/index_en.html |website=www.kwasan.kyoto-u.ac.jp |archive-url=https://web.archive.org/web/20190329105408/https://www.kwasan.kyoto-u.ac.jp/index_en.html |archive-date=2019-03-29 |language=en}}

| 1929

| Kyoto, Japan

bgcolor=#ffffff

|Kvistaberg Observatory

|1948

|Bro, Sweden

Kyung Hee Observatory

|1992

|Seoul, South Korea

Laboratoire d'Astrophysique de Grenoble

|2001

|Grenoble, France

Observatorio de La Cañada (La Cañada Observatory)

|2002

|Ávila, Spain

Ladd Observatory

|1891

|Providence, Rhode Island, US

Lake Afton Public Observatory

|1979

|Wichita, Kansas, US

Lamont–Hussey Observatory (defunct)

|1928

|Bloemfontein, South Africa

Landessternwarte Heidelberg-Königstuhl

|1898

|Königstuhl, Heidelberg, Germany

Landolt Astronomical Observatory

|1939{{Cite web |date=September 1, 2022 |title=History of the Landolt Astronomical Observatory |url=https://www.lsu.edu/physics/about/landolt.php |access-date=September 1, 2022 |publisher=Louisiana State University Department of Physics & Astronomy}}

|Baton Rouge, Louisiana, US

La Plata Astronomical Observatory

|1883

|La Plata, Argentina

La Silla Observatory

|1969

|Atacama Desert, Chile

bgcolor=#FFCC00

|Large High Altitude Air Shower Observatory (LHAASO)

|2019

|Daocheng County, Sichuan, China

Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)

|2009

|Xinglong Station, Hebei, China

Large Millimeter Telescope

|Sierra Negra, Puebla, Mexico

Las Brisas Observatory

|1979

|Colorado, US

Las Campanas Observatory

|La Serena, Chile

Langkawi National Observatory

|2012

|Langkawi Island, Malaysia

Las Cumbres Observatory Global Telescope

|2005

|Global network

Laws Observatory

|1880

|Columbia, Missouri, US

Leander McCormick Observatory

|1885

|Mount Jefferson, Charlottesville, Virginia, US

Lee Observatory

|1873

|American University of Beirut, Beirut, Lebanon

Leiden Observatory

|1633

|Leiden University, Leiden, Netherlands

Leipzig Observatory

|Leipzig, Germany

Leoncito Astronomical Complex

|1986

|Calingasta, San Juan, Argentina

Levenhagen Observatory

|Seattle, Washington, US

Lick Observatory

|1881

|Mount Hamilton, San Jose, California, US

LightBuckets (commercial observatory)

|2007

|Rodeo, New Mexico, US

bgcolor=#0000A0

|LIGO

|{{white|1999}}

|Hanford Site & Livingston, Louisiana, US

Lindheimer Astrophysical Research Center (defunct)

|1966–1995

|Evanston, Illinois, US

-bgcolor=#00FF00

|Llano de Chajnantor Observatory

|2005

|Atacama Desert, Chile

Llano del Hato National Astronomical Observatory

|1975

|Mérida, Venezuela

bgcolor=#99CC99

| Lockyer Technology Centre

| 2010

| Sidmouth, Devon, England, UK

bgcolor=#99CC99

|Long Wavelength Array

|2010

|Socorro, New Mexico, US

Longa Vista Observatory

|2010

|Itatiba, SP, Brazil

Lowell Observatory

:*Anderson Mesa Station

|1894

1959

|Flagstaff, Arizona, US

Lucknow (King of Oudh's) Observatory

|1832–1848

|Lucknow, India

Lulin Observatory

|1999

|Mount Lulin, Taiwan

Lund Observatory

|1749

|Lund, Sweden

bgcolor=#FFCC00

|Luoxue Mountain Cosmic Rays Research Center

|1953

|Luoxue Mountain, Yunnan Province, China

Lyon Observatory

|1878

|Saint-Genis-Laval, France

Macalester College Observatory

|Saint Paul, Minnesota, US

Macfarlane Observatory defunct

|1757

|Glasgow, Scotland, UK

Magdalena Ridge Observatory

|2006

2008
Under construction

|Socorro County, New Mexico, US

Majorca Observatory

|1991

|Majorca, Spain

Malakoff Tower

|1845

|Recife, Brazil

Manastash Ridge Observatory

|1972

|Ellensburg, Washington, US

Manuel Foster Observatory (defunct)

|1903

|Santiago, Chile

Maragheh Observatory

|1259

|Maragheh, Iran

Margaret M. Jacoby Observatory

|1978

|Warwick, Rhode Island, US

Maria Mitchell Observatory

|1908

|Nantucket, Massachusetts, US

Marina Towers Observatory (Not In Use)

|1989

|Maritime Quarter, Swansea, Wales, UK

Markree Observatory (defunct)

|1837

|County Sligo, Ireland

Marseille Observatory

|Marseille, France

Martz Observatory

|Chautauqua County, New York, US

Mauna Kea Observatory

|1967

|Mauna Kea, Hawaii, US

bgcolor=#FFFF99

|Mauna Loa Solar Observatory

|Hawaii, US

Maynard F. Jordan Observatory

|1901

|Orono, Maine, US

McDonald Observatory

|Davis Mountains, Texas, US

McKim Observatory

|1884

|Greencastle, Indiana, US

bgcolor=#FFFF99

|McMath–Hulbert Solar Observatory

|1930

|Lake Angelus, Michigan, US

MDM Observatory

|Kitt Peak, Arizona, US

Mead Observatory

|2001

|Columbus, Georgia, US

Medicina Radio Observatory

|1965

|Medicina, Bologna, Italy

Mees Observatory

|Rochester, New York, US

Mehalso Observatory

|Erie, Pennsylvania, US

Melbourne Observatory

|1862

|Melbourne, Victoria, Australia

Melton Memorial Observatory

|1928

|Columbia, South Carolina, US

Mendenhall Observatory

|2002

|Stillwater, Oklahoma, US

Menke Observatory

|1994

|Davenport, Iowa, US

bgcolor=#99CC99

|Metsähovi Observatory

|1966

|Kirkkonummi, Finland

bgcolor=#FFFF99

|Meudon Observatory

|1876

|Meudon, France

Meyer–Womble Observatory

|1996

|Mount Evans, Colorado, US

Michigan State University Observatory

|1969

|East Lansing, Michigan, US

Observatoire Midi-Pyrénées

:*Pic du Midi Observatory

:*Toulouse Observatory

:*1878

:*1733

|Headquarters: Toulouse, France

Pyrenees, France
Toulouse, France

bgcolor=#FFCC00

|Milagro

|1999

|Los Alamos, New Mexico, US

Miller Observatory

|1976

|Maiden, North Carolina, US

Mills Observatory

|1938

|Dundee, Scotland, UK

[https://www.mindseyeobservatory.org Mind's Eye Observatory IAU W42]

|2018

|Sebastian, Florida, US

MMT Observatory

|1979

|Mount Hopkins, Arizona, US

Modine-Benstead Observatory

|1963

|Union Grove, Wisconsin, US

Modra Observatory

|1988

|Modra, Slovakia

Mohr Observatory (demolished)

|1765–1780

|Jakarta, Indonesia

Moletai Astronomical Observatory

|1969

|Moletai, Lithuania

Molonglo Observatory Synthesis Telescope (MOST)

|1960

|Bungendore, New South Wales, Australia

Mont Mégantic Observatory

|1978

|Mont Mégantic, Québec, Canada

Monterey Institute for Research in Astronomy
(Oliver Observing Station)

|1972
(1984)

| Chews Ridge, California &
Monterey, California, US

Montevideo National Observatory

|Montevideo, Uruguay, {{Coord|34|54.6|S|56|12.8|W}}

Moore Observatory

|1978

|Oldham County, Kentucky, US

Morgan–Monroe Observatory

|1966

|Morgan–Monroe State Forest, Indiana, US

Morris Observatory

|1973

|North Manchester, Indiana, US

Morrison Observatory

|Fayette, Missouri, US

bgcolor=#FFCC00

|Moscow Cosmic-Ray Station

|Troitsk, Russia

Mount Stony Brook Observatory

|1968

|Stony Brook, New York, US

Mounds Observatory

|Tulsa, Oklahoma, US

Mount Abu InfraRed Observatory

|1995

|Mount Abu, Rajasthan, India

Mount Burnett Observatory

|1972

|Mount Burnett, Victoria, Australia

Mount Cuba Astronomical Observatory

|Greenville, Delaware, US

Mount Graham International Observatory

|1993

|Mount Graham, Arizona, US

Mount John University Observatory

|1965

|Lake Tekapo, South Island, New Zealand

Mount Laguna Observatory

|1968

|San Diego, California, US

Mount Lemmon Observatory

|Tucson, Arizona, US

bgcolor=#99CC99

|Mount Pleasant Radio Observatory

|Tasmania, Australia

Mount Stromlo Observatory

|1911

|Canberra, Australia

Mount Suhora Observatory

|1987

|Gorce Mountains, Poland

Mount Wilson Observatory

|1904

|Mount Wilson, Los Angeles County, California, US

Mountain Skies Observatory

|1997

|Lyman, Wyoming, US

bgcolor=#99CC99

|Mullard Radio Astronomy Observatory

|1957

|Cambridge, England, UK

bgcolor=#99CC99

|Murchison Radio-astronomy Observatory

|2012

|Murchison, Western Australia, Australia

Mykolaiv Astronomical Observatory

|1821

|Mykolaiv, Mykolaiv Oblast, Ukraine

Nachi-Katsuura Observatory

|Nachikatsuura, Wakayama, Japan

bgcolor=#99CC99

|Nançay Radio Telescope

|1965

|Nançay, France

Nanjing Astronomical Instruments Research Centre

|1958

|Nanjing, Jiangsu Province, China

National Astronomical Observatory (Colombia)

|1803

|Bogotá, Colombia

National Astronomical Observatory of Japan

|1988

|Headquarters: Mitaka, Tokyo, Japan

National Astronomical Observatory (Mexico)

|1967

|Sierra San Pedro Mártir, Baja California, Mexico

National Observatory (Brazil)

|1827

|Rio de Janeiro, Brazil

National Observatory of Athens

|1842

|Athens, Greece

National Optical Astronomy Observatory

:*Cerro Tololo Inter-American Observatory

:*Gemini Observatory

:*Kitt Peak National Observatory

:*National Solar Observatory

|1982

|Headquarters: Tucson, Arizona, US

National Optical Observatory

|Turkey

bgcolor=#99CC99

|National Radio Astronomy Observatory

:*Atacama Large Millimeter Array

:*Green Bank Telescope

:*Very Large Array

:*Very Long Baseline Array

|1957

|Headquarters: Charlottesville, Virginia, US

National Research Institute of Astronomy and Geophysics (NRIAG)

|1903

|Helwan, Egypt

bgcolor=#FFFF99

|National Solar Observatory

|1952

|Sunspot, New Mexico, US & Kitt Peak, Arizona, US

Naval Research Lab. Radio Sta.

|Sugar Grove, West Virginia, US {{Coord|38|31.2|N|79|16.4|W}}

Naylor Observatory

|1971

|Harrisburg, Pennsylvania, US

Neuchâtel Observatory

|1858

|Neuchâtel, Switzerland

Nha Trang Observatory

|2017

|Nha Trang, Vietnam

Nice Observatory

|1879

|Nice, France

Nieuwland Hall (Napoleon III Telescope)

|1959

|Notre Dame, Indiana, US

Nizamia Observatory

|1907

|Hyderabad, India

Nordic Optical Telescope

| 1988

| Canary Islands, Spain

bgcolor=#FFCC00

|Norilsk Cosmic-Ray Station

|Norilsk, Krasnoyarsk Krai, Russia

Norman Lockyer Observatory

|1912

|Sidmouth, UK

Northern Arizona University Observatory

|Flagstaff, Arizona, US

Northern Skies Observatory

|2009

|Peacham, Vermont, US

Northolt Branch Observatory

|2015

|London, England, UK

Northolt Branch Observatory 2, Shepherd's Bush

|2016

|London, England, UK

Northolt Branch Observatory 3, Blandford Forum

|2017

|London, England, UK

North Georgia Astronomical Observatory

|Dahlonega, Georgia, US

North Otago Astronomical Society Observatory

|Oamaru, South Island, New Zealand

Nyrölä Observatory

|1997

|Jyväskylän maalaiskunta, Western Finland Province, Finland

OAC (Observatorio Astronómico de Córdoba)

|1871

|Córdoba, Argentina

OAO (Observatorio de Aras de los Olmos)

|2008

|Aras de los Olmos, Valencia, Spain

O'Brien Observatory

|1961

|Marine on St. Croix, Minnesota, US

[http://www.astroqueyras.com/ Observatoire du Pic de Château-Renard]

|1974

|Saint-Véran, France

[https://web.archive.org/web/20080511173449/http://www.observatorio.unal.edu.co/ Observatorio Astronómico Nacional (Colombia)]

|1803

|Bogotá, Colombia

Observatorio Astronomico Nacional Tonantzintla

|1961

|Tonantzintla, Mexico

Observatorio Solar Carl Sagan

|2000

|Hermosillo, Sonora, Mexico

Observatory House (defunct)

|1789

|Slough, UK

Observatory of the rue Serpente (defunct)

|1890–1968

|Paris, France

Oil Region Astronomical Observatory

|Venango County, Pennsylvania, US

Onan Observatory

|1990

|Norwood Young America, Minnesota, US

Ondokuz Mayıs University Observatory

|2006

|Samsun, Turkey

Ondřejov Observatory

|1898

|Ondřejov, Czech Republic

bgcolor=#99CC99

|Onsala Space Observatory

|1949

|Onsala, Sweden

bgcolor=#99CC99

|Ooty Radio Telescope

|1970

|Ooty, Tamil Nadu, India

Orchard Hill Observatory

|1965

|Amherst, Massachusetts, US

Orioloromano Observatory

|2007

|Oriolo Romano, Italy

bgcolor=#CCCCCC

|Orion 1 (defunct)

|1971

|Low Earth orbit

bgcolor=#CCCCCC

|Orion 2 (defunct)

|1973

|Low Earth orbit

Orion Ranch Observatory

|2009

|Bertram, Texas, US

Orwell Park School Observatory

|1848

|Nacton, UK

Ostrowik Observatory

|1952

|Ostrowik, Poland

Otter Creek Observatory

|1995

|Meade County, Kentucky, US

bgcolor=#FFCC00

|Oulu Cosmic-Ray Station

|Oulu, Finland

bgcolor=#99CC99

|Owens Valley Radio Observatory

|1958

|Bishop, California, US

Pachmarhi Array of Cerenkov Telescopes (PACT)

|1986

|Pachmarhi, Madhya Pradesh, India

Palisades-Dows Observatory

|1987

|Cedar Rapids, Iowa, US

PAGASA Astronomical Observatory

|1954

|Quezon City, Philippines

Palermo Observatory

|1790

|Palermo, Sicily, Italy

Palomar Observatory

|1948

|Palomar Mountain, California, US

Panzano Observatory

|1640

|Bologna, Italy

Paranal Observatory

|1999

|Cerro Paranal, Atacama Desert, Chile

Paris Observatory

|1667

|Paris, France

bgcolor=#99CC99

|Parkes Observatory

|1961

|Parkes, Australia

Paul Robinson Observatory

|1965

|High Bridge, New Jersey, US

Peach Mountain Observatory

|1950

|Dexter, Michigan, US

Penteli Observatory

|1937

|Penteli, Attica, Greece

Perkins Observatory

|1931

|Delaware, Ohio, US

Perth Observatory

|1896

|Perth, Australia

Peterberg Observatory

|1977

Saarland, Germany

Pic du Midi Observatory

|1878

|Pic du Midi, Pyrenees, France

Pico dos Dias Observatory

|1981

|Minas Gerais, Brazil

Piera Observatory

|1968

|Barcelona, Spain

bgcolor=#FFCC00

|Pierre Auger Observatory

|2004

|Malargüe, Argentina

Pine Bluff Observatory

|1958

|Cross Plains, Wisconsin, US

Pine Mountain Observatory

|1965

|Bend, Oregon, US

Pistoia Mountains Astronomical Observatory

|1990

|Pian dei Termini (near San Marcello Pistoiese), Italy

bgcolor=#99CC99

|Piwnice Ovservatory

|1945

|Piwnice near Toruń, Poland

Planetarium and Astronomical Observatory in Grudziądz

|1972

|Grudziądz, Kujawsko-Pomorskie, Poland

[https://sna.international Plateau Astronomique de La Couronne]

|2024

|Cordes-sur-Ciel, Tarn, France

Pollock Astronomical Observatory

|2004

|Hunting Valley, Ohio, US

Portage Lake Observatory (defunct)

|1948

|Dexter, Michigan, US

Poznań Observatory

|1919

|Poznań, Poland

Prishtina Observatory

|1997

|Pristina Municipality, Kosovo

bgcolor=#CCCCCC

|PROBA-3

|2024

|Low Earth orbit

Puckett Observatory

|1977

|Ellijay, Georgia, US

Pula Observatory

|1869

|Pula, Croatia

Pulkovo Observatory

|1839

|Pulkovskiye Heights, Russia

Purple Mountain Observatory

|1929

|Nanjing, Jiangsu Province, China

bgcolor=#CCCCCC

|2018

bgcolor=#CCCCCC

|2024

Quito Astronomical Observatory

|1873

|La Alameda Park, Quito, Ecuador

Radcliffe Observatory

|1772

|Oxford, England. Moved to Durban, South Africa in 1939

Rainwater Observatory

|French Camp, Mississippi, US

Ralph A. Worley Observatory

|1964

|Shreveport, Louisiana, US

[http://www.dancaton.physics.appstate.edu/Observatories/RSO/RSO.htm Rankin Science Observatory]

|1963

|Appalachian State University, Boone, North Carolina, US

Rancho Mirage Library and Observatory

|2018

|Rancho Mirage, California, US

Rattlesnake Mountain Observatory (defunct)

|1971

|Hanford Reach National Monument, Washington, US

Real Instituto y Observatorio de la Armada (Spain)

|1793

|San Fernando, Cádiz, Spain

Red Barn Observatory

|2006

|Ty Ty, Georgia, US

Red Buttes Observatory

|1994

|Laramie, Wyoming, US

Riley Observatory

|1974

|Naperville, Illinois, US

RIT Observatory

|Rochester, New York, US

Ritter Observatory

|Toledo, Ohio, US

Robert A. Schommer Observatory

|Rutgers University, New Brunswick, New Jersey, US

Robert Brownlee Observatory

|Lake Arrowhead, California, US

Robinson Observatory

|Orlando, Florida, US

Robotic Lunar Observatory (defunct)

|1995

|Flagstaff, Arizona, US

bgcolor=#FFFF99

|Roger Twitchell Observatory{{cite web|url= https://www.msad17.org/page/twitchell-observatory/ |title = Twitchell Observatory {{vbar}} MSAD 17 |website= MSAD17.org | publisher = Maine Department of Education |access-date= December 30, 2022}}

|1972

|Paris, Maine, US

Rogers Observatory

|1981

|Traverse City, Michigan, US

Rolnick Observatory

|Westport, Connecticut, US

Rome Observatory

|1938

|Italy

Roseland Observatory

|1998

|St Stephen-in-Brannel, UK

Rossall School Observatory

|Rossall, UK

Rothney Astrophysical Observatory

|1984

|Priddis, Alberta, Canada

Royal Observatory, Greenwich

|1675

|Greenwich, England, UK

Royal Observatory, Edinburgh

|1896

|Edinburgh, Scotland, UK

Roque de los Muchachos Observatory

|1979 (officially inaugurated in 1985)

|La Palma, Canary Islands, Spain.

Rosemary Hill Observatory

|Bronson, Florida, US

Rozhen Observatory

|1981

|Peak Rozhen, Bulgaria

Rutherford Observatory

|1920s

|New York City, New York, US

bgcolor=#FFFF99

|[http://www.csun.edu/sfo/index.html San Fernando Observatory (SFO)]

|1976

|Sylmar, California, US

Sankt Andreasberg Observatory

|2014

|Sankt Andreasberg, Germany

Sayan Spectrographic Cosmic Ray Complex

|Irkutsk, Russia

SFA Observatory

|1976

|Nacogdoches, Texas, US

Sagamore Hill Radio Observatory

|1963

|Hamilton, Massachusetts, US

[https://limaastro.com Schoonover Observatory]

|1964

|Lima, Ohio, US

Shattuck Observatory

|1854

|Hanover, New Hampshire, US

Sherwood Observatory

|1972

|Mansfield, UK

Seven Hills Observatory

|1996

|Kearney, Nebraska, US

Shamakhi Astrophysical Observatory

|1958

|Shamakhi, Azerbaijan

Shanghai Astronomical Observatory

|1962

|Shanghai, China

Sherzer Observatory

|1878

|Ypsilanti, Michigan, US

Sheshan Astronomical Observatory

|1900

|Shanghai, China

Siding Spring Observatory

|1924

|Siding Spring, New South Wales, Australia

bgcolor=#FFFF99

| Sidmouth Observatory

| 1912

| Sidmouth, Devon, England, UK

Sierra Nevada Observatory

|1981

|Sierra Nevada, Spain

Silesian Planetarium and Astronomical Observatory

|1955

|Chorzów / Katowice, Silesia, Poland

Simeiz Observatory

|1906

|Simeiz, Crimea, Ukraine

Skalnaté Pleso Observatory

|1953

|Vysoké Tatry, Slovakia

Skinakas Observatory

|1984

|Crete, Greece

Skylab

|1973

|Low Earth orbit; re-entered in 1979

Smith Observatory

|1880s

|Beloit, Wisconsin, US

Smithsonian Astrophysical Observatory

|1890

|Cambridge, Massachusetts, US

Sobaeksan Optical Astronomy Observatory

|1978

|Sobaeksan, South Korea

Sola Fide Observatory

|1990s

|Austin, Minnesota, US

bgcolor=#CCCCCC

|Solar and Heliospheric Observatory (SOHO)

|1996

|Earth–Sun L1 point

bgcolor=#CCCCCC

|Solar Space Telescope

|2009

|709 km SSO; life: 3 years

Sommers–Bausch Observatory

|1949

|Boulder, Colorado, US

Sonnenborgh Observatory

|1853

|Utrecht, Netherlands

Sonoma State Observatory

|1976

|Rohnert Park, California, US

South African Astronomical Observatory

:*Cape Town

:*Sutherland

1820
1972

|Observatory, Cape Town, South Africa

Sutherland, Northern Cape, South Africa

Southern Astrophysical Research Telescope (SOAR)

|2004

|Cerro Pachón, Chile

bgcolor=#99CC99

|South Pole Telescope

|2007

|Antarctica

bgcolor=#CCCCCC

|Spanish National Observatory

|1790

|Madrid, Spain

Special Astrophysical Observatory of the Russian Academy of Sciences

|1966

|Zelenchukskaya, near Arkhyz, Caucasus Mountains, Russia

Sperry Observatory

|1967

|Cranford, New Jersey, US

bgcolor=#CCCCCC

|SPHEREx

|2025

|Sun-synchronous Earth orbit

bgcolor=#CCCCCC

|Spitzer Space Telescope

|2003

|Heliocentric orbit

Springfield Observatory

|1968

|Springfield, Massachusetts, US

Sproul Observatory

|1911

|Swarthmore, Pennsylvania, US

Stardome Observatory

|1967

|Auckland, North Island, New Zealand

Starkenburg Observatory

|1970

|Heppenheim, Germany

Štefánik's Observatory

|1928

|Prague, Czech Republic

Stellafane Observatory

|1920

|Springfield, Vermont, US

bgcolor=#f58242

|[https://StellarVistaObservatory.org Stellar Vista Observatory]

|2019

|Kanab, Utah, US

[https://stephensobservatory.org/ Stephens Memorial Observatory]

|1901

|Hiram, Ohio, US

Steward Observatory

:*MMT Observatory

:*Mount Graham International Observatory

:*Mount Lemmon Observatory

|1916

|Tucson, Arizona, US

Stickney Observatory{{Cite web|url=https://observatory.bennington.edu/|title=Stickney Observatory at Bennington College|website=Stickney Observatory at Bennington College}}

|1950s

|Bennington, Vermont, US

Stjerneborg

|1581

|Hven, Sweden

Stockholm Observatory

|1749

|Stockholm, Sweden

Stokesville Observatory

|1970s

|Virginia, US

Stone Observatory

|1853

|Stone, Buckinghamshire, UK

Stonyhurst Observatory

|1838

|Lancashire, England

Strasbourg Observatory

|1881

|Strasbourg, France

bgcolor=#00FFFF

Stratospheric Observatory for Infrared Astronomy

|2006

|14 km in Earth stratosphere

Stull Observatory

|1966

|Alfred, New York, US

Stuttgart Observatory

|1920

|Stuttgart, Germany

bgcolor=#00FF00

|Submillimeter Array

|1987

|Mauna Kea, Hawaii, US

St. Thomas Observatory

|2009

|Saint Paul, Minnesota, US

bgcolor=#CCCCCC

|Space Variable Objects Monitor

|2004

|Low Earth orbit

bgcolor=#FFCC66

|Sudbury Neutrino Observatory

|1999

|Sudbury, Ontario, Canada

Sunriver Observatory

|1990

|Sunriver, Oregon, US

bgcolor=#CCCCCC

|Swift Gamma-Ray Burst Mission

|2004

|Low Earth orbit

Swiss Observatory Polychron and Astronomy

|2019

|Geneva, Switzerland

Sydney Observatory

|1858

|Sydney, Australia

Table Mountain Observatory

|Angeles National Forest, Wrightwood, California, US

Tacubaya Observatory

|1882

|Tacubaya, Mexico City, Mexico

bgcolor=#99CC99

|Taeduk Radio Astronomy Observatory

|1986

|Taejon, South Korea

Tamke-Allan Observatory

|1998

|Roane County, Tennessee, US

Tartu Observatory

|1964

|Tartumaa, Estonia

Teide Observatory

|1964

|Tenerife, Canary Islands, Spain

Ten Acre Observatory

|Tribbey, Oklahoma, US

Terskol Peak Observatory

|1989

|Terskol, Kabardino-Balkaria, Russia

Thai National Observatory

|2013

|Doi Inthanon, Chiang Mai, Thailand

[https://thedamobservatory.com The Dam Observatory]

|2017

|Lake Tschida, North Dakota, US

The Heights Observatory

|1989

|The Heights School, South Australia, Australia

Texas A&M Astronomical Observatory

|College Station, Texas, US

Theodore Jacobsen Observatory

|1895

|Seattle, Washington, US

Thompson Observatory

|1968

|Beloit, Wisconsin, US

bgcolor=#FFCC00

|Tien Shan Astronomical Observatory

|Almaty, Kazakhstan

Tuorla Observatory

|1952

|Piikkiö, Finland

Trieste Observatory

|Trieste, Italy

Troodos Observatory

|2023

|Agridia, Troodos Mountains, Cyprus

bgcolor=#CCCCCC

|Trottier Observatory

|2015

|Simon Fraser University, Burnaby, Canada

Turin Observatory

|1759

|Pino Torinese, Italy

bgcolor=#FFFF99

|Udaipur Solar Observatory

|Udaipur, Rajasthan, India

bgcolor=#99CC99

|Ukrainian T-shaped Radio telescope, second modification

|1972

|Shevchenkove, Ukraine

Ulugh Beg Observatory

|1420s

|Samarkand, Uzbekistan

University of Alabama Observatory

|1950

|Tuscaloosa, Alabama, US

University of Alabama Observatory (Old)

|1849–1890s

|Tuscaloosa, Alabama, US

University of North Alabama Observatory

|Florence, Alabama, US

University of Illinois Astronomical Observatory

|1896

|Urbana, Illinois, US

University of London Observatory

|1929

|London, England, UK

University of Maryland Observatory

|College Park, Maryland, US

University of Michigan-Dearborn Observatory

|2007

|Dearborn, Michigan, US

University of New Hampshire Observatory

|1985

|Durham, New Hampshire, US

University of Oklahoma Observatory

|Norman, Oklahoma, US

University of Puerto Rico at Humacao Observatory{{Cite journal |last=Muller |first=R. J. |date=Summer 1994 |title=The Humacao University Observatory |url=http://adsabs.harvard.edu/full/1994IAPPP..56...43M |journal=International Amateur-Professional Photoelectric Photometry Communication |volume=56 |issue=43 |page=43 |bibcode=1994IAPPP..56...43M}}

|1985

|Humacao, Puerto Rico, US

University of Valencia Astronomical Observatory

|1909

|Valencia, Spain

Uppsala Astronomical Observatory

|1741

|Uppsala, Sweden

|Berlin, Germany

|1909

|Vienna, Austria

Urania Observatory (Zürich)

|1907

|Zürich, Switzerland

Uraniborg

|1572–1597 (demolished)

|Hven, Sweden

Urumqi Astronomical Observatory

|1957

|Urumqi, Xinjiang, China

U.S. Naval Observatory (USNO){{Cite web|date=2016-08-15|title=Records of the U.S. Naval Observatory|url=https://www.archives.gov/research/guide-fed-records/groups/078.html|access-date=2021-04-14|website=National Archives|language=en}}

|1844

1830–1844
1955

|Washington, D.C., US

Washington, D.C., US
Flagstaff, Arizona, US

Valongo Observatory

|1881

|Rio de Janeiro, Brazil

Vainu Bappu Observatory

|1968

|Kavalur, Tamil Nadu, India

Astronomical observatory of Aosta Valley

|2003

|Nus, Aosta Valley, Italy

Van Vleck Observatory

|1914

|Middletown, Connecticut, US

Vanderbilt University Observatory

|Nashville, Tennessee, US

Vartiovuori Observatory (defunct)

|1819–1834

|Turku, Finland

Vassar College Observatory (defunct)

|1865

|Poughkeepsie, New York, US

Vatican Observatory

:*Vatican Advanced Technology Telescope

|1891

1993

|Headquarters: Castel Gandolfo, Italy

:*Mount Graham, Arizona, US

Veen Observatory

|1970

|Lowell, Michigan, US

Vega–Bray Observatory

|1990

|Benson, Arizona, US

bgcolor=#99CC99

|Ventspils Starptautiskais Radioastronomijas Centrs

|Irbene, Latvia

Vernonia Peak Observatory

|Vernonia, Oregon, US

bgcolor=#99CC99

|Very Large Array

|1980

|Socorro, New Mexico, US

bgcolor=#99CC99

|Very Long Baseline Array

|1993

|Various locations on Earth

Vienna Observatory

|1753

|Vienna, Austria

Vilnius University Observatory

|1753

|Vilnius University, Lithuania

Višnjan Observatory

|1978

|Višnjan, Croatia

Vsetín Observatory

|1950

|Vsetín, Czech Republic

bgcolor=#99CC99

|Warkworth Radio Observatory

|2008

|Warkworth, New Zealand

Warner Observatory (defunct)

|1882

|Rochester, New York, US

Warner and Swasey Observatory

|1919

|Cleveland, Ohio, US

Warren Rupp Observatory

|1985

|Mansfield, Ohio, US

University of Warsaw Observatory

|1825

|Warsaw, Poland

Washburn Observatory

|1881

|Madison, Wisconsin, US

Wast Hills Observatory

|1982

|Birmingham, England, UK

Weaver Student Observatory

|1998

|Monterey, California, US

Weitkamp Observatory

|1955

|Westerville, Ohio, US

West Mountain Observatory

|1981

|West Mountain, Utah, US

Whakatane Astronomical Society

|1964

|Whakatāne, New Zealand

Whitin Observatory

|1901

|Wellesley, Massachusetts, US

Widener University Observatory

|2004

|Chester, Pennsylvania, US

Wilder Observatory

|1903

|Amherst, Massachusetts, US

Willard L. Eccles Observatory

|2009

|Frisco Peak, Utah, US

William Brydone Jack Observatory

|1851

|Fredericton, New Brunswick, Canada

Williams Observatory

|1990

|Boiling Springs, North Carolina, US

Winer Observatory

|1983

|Sonoita, Arizona, US

Winfree Observatory

|1900

|Lynchburg, Virginia, US

Wise Observatory

|1971

|Negev, Israel

Witte Observatory

|1984

|Mediapolis, Iowa, US

WIYN Observatory

|1994

|Kitt Peak, Arizona, US

Wyoming Infrared Observatory

|1975

|Laramie, Wyoming, US

Xiangfen Astronomical Observatory

|data-sort-value="-2100"|2100 BCE

|Xiangfen County, Linfen, Shanxi Province, China

Xinglong Station (NAOC)

|Xinglong County, Chengde, Hebei province, China{{cite web|url=http://english.nao.cas.cn/resources/gallery/202103/t20210321_266312.html|date=2021-03-21|title=Xinglong Observing Station|archive-url=https://web.archive.org/web/20230123094650/http://english.nao.cas.cn/resources/gallery/202103/t20210321_266312.html|archive-date=2023-01-23}}

Xinjiang Astronomical Observatory

|1968

|Urumqi, Xinjiang, China

bgcolor=#CCCCCC

|XMM-Newton

|1999

|Highly eccentric Earth orbit

bgcolor=#CCCCCC

|2023

bgcolor=#CCCCCC

|2024

Xujiahui Astronomical Observatory

|1872

|Shanghai, China

bgcolor=#FFCC00

|Arctic Space Weather Center

|Yakutsk, Russia

Yale Student Observatory

|New Haven, Connecticut, US

bgcolor=#FFCC00

|Yangbajing International Cosmic-Ray Observatory

|Yangbajing Valley, Tibet, China

Yantra Mandir

|1724

|New Delhi, Delhi, India

bgcolor=#FFCC00

|Yerevan Cosmic-Ray Station

|Yerevan, Armenia

Yerkes Observatory

|1897

|Williams Bay, Wisconsin, US

York University Observatory

|1969

|Toronto, Ontario, Canada

Yuba City Astronomical Observatory

|2010

|Yuba City, California, US

Yunnan Astronomical Observatory

|1957

|Kunming, Yunnan, China

Zimmerwald Observatory

|1956

|Zimmerwald, Switzerland

Zadko Observatory

|2009

|Gingin, Australia

References

External links

[http://www.astro.uni-bonn.de/~pbrosche/hist_astr/ha_obs.html History of Astronomy: Observatories and other places]
[http://cleardarksky.com/cgi-bin/find_clock.py?keys=%22%5C%28observatoire%5C%7Cobservatory%5C%7Cobservatories%5C%29%22&type=text&doit=Find Observatories with Clear Sky Clocks]
[https://gostargazing.co.uk/observatories-in-the-uk/ Map of observatories in the United Kingdom]

Observatories

:List of astronomical observatories

Observatories

See also

References

External links