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List of largest optical reflecting telescopes#Proposed

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| caption1 = Gran Telescopio Canarias

| caption2 = W. M. Keck Observatory

| caption3 = Subaru Telescope

| caption4 = Hobby–Eberly Telescope

| caption5 = Large Binocular Telescope

| caption6 = Very Large Telescope

| caption7 = Southern African Large Telescope

| caption8 = Gemini Observatory

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| header = Telescopes with aperture diameter >8 metres

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This list of the largest optical reflecting telescopes with objective diameters of {{Convert|3.0|m|in}} or greater is sorted by aperture, which is a measure of the light-gathering power and resolution of a reflecting telescope. The mirrors themselves can be larger than the aperture, and some telescopes may use aperture synthesis through interferometry. Telescopes designed to be used as optical astronomical interferometers such as the Keck I and II used together as the Keck Interferometer (up to 85 m) can reach higher resolutions, although at a narrower range of observations. When the two mirrors are on one mount, the combined mirror spacing of the Large Binocular Telescope (22.8 m) allows fuller use of the aperture synthesis.

Largest does not always equate to being the best telescopes, and overall light gathering power of the optical system can be a poor measure of a telescope's performance. Space-based telescopes, such as the Hubble Space Telescope, take advantage of being above the Earth's atmosphere to reach higher resolution and greater light gathering through longer exposure times. Location in the northern or southern hemisphere of the Earth can also limit what part of the sky can be observed, and climate conditions at the observatory site affect how often the telescope can be used each year.

The combination of large mirrors, locations selected for stable atmosphere and favorable climate conditions, and active optics and adaptive optics to correct for much of atmospheric turbulence allow the largest Earth based telescopes to reach higher resolution than the Hubble Space Telescope.{{Cite web|last=|title=Neptune from the VLT and Hubble|url=https://www.eso.org/public/images/eso1824c/|access-date=2021-02-23|website=www.eso.org|language=en}} Another advantage of Earth based telescopes is the comparatively low cost of upgrading and replacing instruments.

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Table of reflecting telescopes

Telescopes in this list are ordered by effective optical aperture, given as the diameter of a circle with equivalent collecting area. Aperture has historically been a useful gauge of telescopes' limiting resolution, optical area, physical size, and cost. Multiple mirror or segmented mirror telescopes that are on the same mount and usually form a single combined image are ranked by their equivalent combined aperture. Telescopes that cannot use their entire primary mirror at once (e.g. HET or LAMOST) are listed by their maximum effective aperture. Telescopes that are sometimes used for optical interferometry are listed individually, not as a combined instrument. All telescopes with an effective aperture of at least {{convert|3.00|m|in}} at visible or near-infrared wavelengths are included; selected smaller telescopes are listed elsewhere.

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|+Reflecting telescopes

Name || class="unsortable"| Image ||data-sort-type="number"| Effective aperture || Mirror type || Nationality / Sponsors || Site || First light
Large Binocular Telescope (LBT)50px{{convert|11.9|m|in|sigfig=3|abbr=on}} (combined)[http://oldweb.lbto.org/pdfs/06_Orlando.pdf SPIE 2006 in Orlando – Proceedings of SPIE conference 6267 on "Ground-based and Airborne Telescopes", "The Large Binocular Telescope", John M. Hill, Richard F. Green and James H. Slagle]Multiple
Two {{convert|8.4|m|in|sigfig=3|abbr=on}} mirrors		USA, Italy, GermanyMount Graham International Observatory, Arizona, USA2005
Gran Telescopio Canarias (GTC)50px{{convert|10.4|m|in|sigfig=3|abbr=on}}Segmented
36 hexagonal segments		Spain, Mexico, USARoque de los Muchachos Obs., Canary Islands, Spain2006
Hobby–Eberly Telescope (HET)50px{{convert|10|m|in|sigfig=3|abbr=on}} (effective) {{Cite web|url=https://mcdonaldobservatory.org/news/releases/20151102|title=Upgraded Hobby–Eberly Telescope Sees First Light|website=McDonald Observatory|access-date=2016-07-29}}Segmented
91 × {{convert|1|m|in|sigfig=2|abbr=on}} hexagonal segments forming an 11 m × 9.8 m mirror		USA, GermanyMcDonald Observatory, Texas, USA1997
Aperture increased 2015
Keck 150px{{convert|10|m|in|sigfig=3|abbr=on}}Segmented
36 hexagonal segments		USAMauna Kea Observatories, Hawaii, USA1993
Keck 250px{{convert|10|m|in|sigfig=3|abbr=on}}Segmented
36 hexagonal segments		USAMauna Kea Observatories, Hawaii, USA1996
Southern African Large Telescope (SALT)50px{{convert|9.2|m|in|sigfig=3|abbr=on}} (effective){{cite web|url=http://science.howstuffworks.com/ten-amazing-telescopes.htm/printable |title=Howstuffworks "10 Amazing Telescopes" |publisher=Science.howstuffworks.com |access-date=August 19, 2009 |url-status=dead |archive-url=https://web.archive.org/web/20081222135123/http://science.howstuffworks.com/ten-amazing-telescopes.htm/printable |archive-date=December 22, 2008 }}Segmented
91 × {{convert|1|m|in|sigfig=2|abbr=on}} hexagonal segments forming an 11 m × 9.8 m mirror		South Africa, USA, UK, Germany, Poland, New ZealandSouth African Astronomical Obs., Northern Cape, South Africa2005
Subaru (JNLT)50px{{convert|8.2|m|in|sigfig=3|abbr=on}}SingleJapanMauna Kea Observatories, Hawaii, USA1999
VLT UT1 – Antu50px{{convert|8.2|m|in|sigfig=3|abbr=on}}SingleESO Countries, ChileParanal Observatory, Antofagasta Region, Chile1998
VLT UT2 – Kueyen50px{{convert|8.2|m|in|sigfig=3|abbr=on}}SingleESO Countries, ChileParanal Observatory, Antofagasta Region, Chile1999
VLT UT3 – Melipal50px{{convert|8.2|m|in|sigfig=3|abbr=on}}SingleESO Countries, ChileParanal Observatory, Antofagasta Region, Chile2000
VLT UT4 – Yepun50px{{convert|8.2|m|in|sigfig=3|abbr=on}}SingleESO Countries, ChileParanal Observatory, Antofagasta Region, Chile2001
Gemini North {{small|(Gillett)}}50px{{convert|8.1|m|in|sigfig=3|abbr=on}}SingleUSA, UK, Canada, Chile, Australia, Argentina, BrazilMauna Kea Observatories, Hawaii, USA1999
Gemini South50px{{convert|8.1|m|in|sigfig=3|abbr=on}}SingleUSA, UK, Canada, Chile, Australia, Argentina, BrazilCerro Pachón (CTIO), Coquimbo Region, Chile2001
James Webb Space Telescope

| 50px

| 6.5 m

(256 in)

| Segmented
18 hexagonal segments

| NASA, ESA, CSA

| Halo orbit around the Earth-Sun L2 Point

| 2022

MMT (current optics)50px{{convert|6.5|m|in|sigfig=3|abbr=on}}SingleUSAF. L. Whipple Obs., Arizona, USA2000
Magellan 1 {{small|(Walter Baade)}}{{cite web |url=http://obs.carnegiescience.edu/Magellan |title=The Carnegie Observatories – Magellan Telescopes |publisher=Carnegie Institution for Science |access-date=2017-05-24 |archive-date=2017-05-25 |archive-url=https://web.archive.org/web/20170525193610/http://obs.carnegiescience.edu/magellan |url-status=dead }}50px{{convert|6.5|m|in|sigfig=3|abbr=on}}SingleUSALas Campanas Obs., Atacama Region, Chile2000
Magellan 2 {{small|(Landon Clay)}}50px{{convert|6.5|m|in|sigfig=3|abbr=on}}SingleUSALas Campanas Obs., Atacama Region, Chile2002
Tokyo Atacama Observatory (TAO)

|

|{{convert|6.5|m|in|sigfig=3|abbr=on}}

|Single

|Japan

|Cerro Chajnantor, Atacama Desert, Chile

|2024{{Cite web |last=Carter |first=Jamie |title=Meet The Highest Telescope In The World, Which Just Looked Up For The First Time |url=https://www.forbes.com/sites/jamiecartereurope/2024/05/03/meet-tao-the-highest-telescope-in-the-world-which-just-looked-up-for-the-first-time/ |access-date=2024-05-05 |website=Forbes |language=en}}

BTA-6| 50px{{convert|6|m|in|sigfig=3|abbr=on}}SingleUSSR/RussiaSpecial Astrophysical Obs., Karachay–Cherkessia, Russia1975
Large Zenith Telescope (LZT)50px{{convert|6|m|in|sigfig=3|abbr=on}}LiquidCanada, France, United States Andersen, Geoff. The Telescope, p. 165Maple Ridge, British Columbia, Canada2003
Decommissioned 2016
Hale Telescope50px{{convert|200|in|m|sigfig=3|abbr=on|order=flip}}SingleUSAPalomar Observatory, California, USA1949
LAMOST50px{{convert|4.9|m|in|sigfig=3|abbr=on}} (effective){{cite web|url=http://www.lamost.org/lamost/documents/lamost_review_0810.pdf |archive-url=https://web.archive.org/web/20110722011303/http://www.lamost.org/lamost/documents/lamost_review_0810.pdf|archive-date=July 22, 2011 |title=Large Sky Area Multi-Object Fiber Spectroscopic Telescope LAMOST |quote=the effective aperture in diameter is 3.6m - 4.9m}}Segmented
37 segments for the 6.67 m × 6.05 m primary and 24 segments for the 5.72 m × 4.40 m corrector; effective aperture 3.6–4.9 m{{cite web |url=http://www.lamost.org/public/gallery |title=LAMOST Homepage – Gallery |publisher=Lamost.org |date=August 13, 2012 |access-date=January 6, 2018}}		ChinaBeijing Astronomical Obs., Xinglong, China2008
MMT (original optics)
{{small|(see above for current version)}}		50px{{convert|4.7|m|in|sigfig=3|abbr=on}} (combined){{cite web|author=Dwayne DayMonday, May 11, 2009 |url=http://www.thespacereview.com/article/1371/1 |title=Mirrors in the dark |publisher=The Space Review |date=2009-05-11 |access-date=2012-01-03}}Multiple
Six {{convert|1.8|m|in|sigfig=2|abbr=on}} mirrors		USAF. L. Whipple Obs., Arizona, USA1979
Mirrors removed 1998
Lowell Discovery Telescope{{Cite web |url=https://lowell.edu/research/research-facilities/4-3-meter-dct/ |title=Lowell Observatory – 4.3-meter DCT |access-date=2018-01-06 |archive-date=2016-11-04 |archive-url=https://web.archive.org/web/20161104104938/https://lowell.edu/research/research-facilities/4-3-meter-dct/ |url-status=dead }}50px{{convert|4.3|m|in|sigfig=3|abbr=on}}SingleUSALowell Observatory, Happy Jack, Arizona, USA2012
William Herschel Telescope50px{{convert|4.2|m|in|sigfig=3|abbr=on}}SingleUK, Netherlands, SpainRoque de los Muchachos Obs., Canary Islands, Spain1987
SOAR50px{{convert|4.1|m|in|sigfig=3|abbr=on}}SingleUSA, BrazilCerro Pachón (CTIO), Coquimbo Region, Chile2002
VISTA50px{{convert|4.1|m|in|sigfig=3|abbr=on}}SingleESO Countries, ChileParanal Observatory, Antofagasta Region, Chile2009
Víctor M. Blanco Telescope50px{{convert|4|m|in|sigfig=3|abbr=on}}SingleUSACerro Tololo Inter-American Obs., Coquimbo Region, Chile1976
International Liquid Mirror Telescope{{convert|4|m|in|sigfig=3|abbr=on}}LiquidBelgium, Canada, India, PolandARIES Devasthal Observatory, Nainital, India2022
Nicholas U. Mayall 4 m{{cite web|url=http://www.noao.edu/outreach/kptour/mayall.html |title=The Mayall 4-Meter Telescope |publisher=Noao.edu |date=February 27, 1973 |access-date=August 19, 2009}}50px{{convert|4|m|in|sigfig=3|abbr=on}}SingleUSAKitt Peak National Obs., Arizona, USA1973
Daniel K. Inouye Solar Telescope50px{{convert|4|m|in|sigfig=3|abbr=on}}SingleUSAHaleakala Observatory, Hawaii, USA2019
Anglo-Australian Telescope (AAT)50px{{convert|3.89|m|in|sigfig=3|abbr=on}}SingleAustralia, UKAustralian Astronomical Obs., New South Wales, Australia1974
United Kingdom Infrared Telescope (UKIRT)50px{{convert|3.8|m|in|sigfig=2|abbr=on}}SingleUK, United StatesMauna Kea Observatories, Hawaii, USA1979
3.67 m AEOS Telescope (AEOS)50px{{convert|3.67|m|in|sigfig=3|abbr=on}}SingleUSAAir Force Maui Optical Station, Hawaii, USA1996
3.6 m Devasthal Optical Telescope{{cite book |last1=Sagar |first1=Ram |last2=Kumar |first2=Brijesh |last3=Omar |first3=Amitesh |last4=Pandey |first4=A. K. |chapter=New optical telescope projects at Devasthal Observatory |date=2012 |title=Ground-based and Airborne Telescopes IV |series=Proceedings of the SPIE |volume=8444 |pages=84441T |arxiv=1304.2474 |bibcode=2012SPIE.8444E..1TS |doi=10.1117/12.925634 |s2cid=119272065 |editor-first1=Larry M. |editor-first2=Roberto |editor-first3=Helen J. |editor-last1=Stepp |editor-last2=Gilmozzi |editor-last3=Hall}} (DOT)50px{{convert|3.6|m|in|sigfig=3|abbr=on}}SingleIndiaARIES Devasthal Observatory, Nainital, India2016
Telescopio Nazionale Galileo (TNG)50px{{convert|3.58|m|in|sigfig=3|abbr=on}}SingleItalyRoque de los Muchachos Obs., Canary Islands, Spain1997
New Technology Telescope (NTT)50px{{convert|3.58|m|in|sigfig=3|abbr=on}}SingleESO countriesLa Silla Observatory, Coquimbo Region, Chile1989
Canada-France-Hawaii Telescope (CFHT)50px{{convert|3.58|m|in|sigfig=3|abbr=on}}SingleCanada, France, USAMauna Kea Observatories, Hawaii, USA1979
ESO 3.6 m Telescope| 50px{{convert|3.57|m|in|sigfig=3|abbr=on}}SingleESO countriesLa Silla Observatory, Coquimbo Region, Chile1977
MPI-CAHA 3.5 m{{cite web|url=http://www.mpia.de/Public/menu_q2.php?Aktuelles/PR/2004/PR041116/PR_041116_en.html |title=Max-Planck-Institut für Astronomie |publisher=Mpia.de |date=July 20, 1994 |access-date=August 19, 2009}}50px{{convert|3.5|m|in|sigfig=3|abbr=on}}SingleWest Germany, SpainCalar Alto Obs., Almería, Spain1984
USAF Starfire 3.5 m{{cite web |author=Pike |first=John |title=Starfire |url=http://www.globalsecurity.org/space/systems/starfire.htm |access-date=August 19, 2009 |publisher=Globalsecurity.org}}| 50px{{convert|3.5|m|in|sigfig=3|abbr=on}}SingleUSAStarfire Optical Range, New Mexico, USA1994
WIYN Telescope50px{{convert|3.5|m|in|sigfig=3|abbr=on}}SingleUSAKitt Peak National Obs., Arizona, USA1994
Space Surveillance Telescope50px{{convert|3.5|m|in|sigfig=3|abbr=on}}SingleUSA, AustraliaWhite Sands Missile Range, New Mexico, United States
Relocated to
Harold E. Holt Naval Communication Station, Western Australia.		2011
Relocated
2020
Astrophysical Research Consortium (ARC)50px{{convert|3.48|m|in|sigfig=3|abbr=on}}SingleUSAApache Point Obs., New Mexico, USA1994
Iranian National Observatory (INO340)File:INO340.png{{convert|3.4|m|in|sigfig=2|abbr=on}}SingleIranMount Gargash, Isfahan Province, Iran2022{{cite news |last1=Stone |first1=Richard |title='The door is open': Iranian astronomers seek collaborations for their new, world-class telescope |url=https://www.science.org/content/article/door-open-iranian-astronomers-seek-collaborations-their-new-world-class-telescope |access-date=21 October 2022 |work=Science |date=19 October 2022 |doi=10.1126/science.adf4145}}
Shane Telescope50px{{convert|3.05|m|in|sigfig=3|abbr=on}}SingleUSALick Observatory, California, USA1959
NASA Infrared Telescope Facility50px{{convert|3.0|m|in|sigfig=3|abbr=on}}SingleUSAMauna Kea Observatory, Hawaii, USA1979
NASA-LMT50px{{convert|3|m|in|sigfig=3|abbr=on}}LiquidUSANASA Orbital Debris Obs., New Mexico, USA1995
Decommissioned 2002{{cite web|url=http://www.astro.ubc.ca/lmt/Nodo/index.html |title=NASA Orbital Debris Observatory |publisher=Astro.ubc.ca |access-date=August 19, 2009}}

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|colspan=8 style="padding: 8px; background-color: #f2f2f2; text-align: center;" | For continuation of this list, see List of large optical reflecting telescopes

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Chronological list of largest telescopes

These telescopes were the largest in the world at the time of their construction, by the same aperture criterion as above.

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|+Reflecting telescopes (chronologically)

Years Largest || Name || Out || In || Aperture (m) || Area (m2) || M1 Mirror || Note || Altitude (m)
2009–PresentGran Telescopio Canarias50px50px10.47436 × 1.9 m hexagons M1 mirrorSegmented mirror2267
1993–2009Keck 150px40px1076 {{cite web|url=http://spacecraftkits.com/KFacts.html |title=Keck Telescope Facts |publisher=Spacecraftkits.com |access-date=2012-01-03}}36 × 1.8 m hexagons M1 mirrorSegmented mirror, M1 f/1.754145
1976–1993BTA-650px50px626605 cm f/4 M1 mirrorMirror replaced twice2070
1948–1976Hale (200 inch)50px50px5.1–508 cm f/3.3 M1 mirrorArt deco dome1713
1917–1948Hooker (100 inch)30px2.54–Also used for 1st optical interferometer1742
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|colspan=9|For earlier entries, see List of largest optical telescopes historically

File:Telescopes Size and Year Built.png

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Future telescopes

=Under construction=

File:ELT dome reaches its highest point (Tijerales 2).jpg under construction in April 2025]]

These telescopes are under construction and will meet the list inclusion criteria once completed:

  • Extremely Large Telescope, Chile – {{convert|39.3|m|in|sigfig=3|abbr=on}}. Construction began in 2018, first light planned in 2028.{{Cite web |title=Timeline |website=The Extremely Large Telescope |publisher=European Southern Observatory |url=https://elt.eso.org/about/timeline/ |access-date=2023-09-03}}
  • Thirty Meter Telescope, Hawaii, USA – {{convert|30|m|in|sigfig=2|abbr=on}}. Construction began in 2014 but halted in 2015; {{as of|lc=yes|2022}} it has not resumed.{{cite web |title=Timeline |url=https://www.tmt.org/page/timeline |publisher=TMT International Observatory |access-date=27 September 2022}}
  • Giant Magellan Telescope, Chile – seven 8.4 m mirrors on a single mount. This provides an effective aperture equivalent to a 21.4 m mirror and the resolving power equivalent to a 24.5 m mirror. First light planned in 2029.{{cite web|url=https://www.gmto.org/overview/quick-facts/ |title=Quick Facts |publisher=Gmto.org |access-date=2021-02-15}}
  • Vera C. Rubin Observatory, Chile – {{convert|8.4|m|in|sigfig=2|abbr=on}}. First light planned in 2025.{{cite web |title=Construction Project Status |url=https://www.lsst.org/about/project-status |date=16 October 2022 |access-date=17 October 2022 |work=Rubin Observatory|quote=27-Jan-2025 System First Light with LSSTCam}}
  • San Pedro Martir Telescope, Baja California, Mexico – {{convert|6.5|m|in|sigfig=2|abbr=on}}. First light planned in 2023.[https://news.azpm.org/p/news-topical-sci/2017/11/13/119939-universities-in-us-and-mexico-partner-on-telescope-project/ Universities in U.S. and Mexico Partner on Telescope Project]. Arizona Public Media, 13 November 2017.{{needs update|date=October 2024}}
  • Magdalena Ridge Observatory Interferometer, New Mexico, USA – An optical interferometer array with ten {{convert|1.4|m|in|sigfig=2|abbr=on}} telescopes. The light gathering power is equivalent to a {{convert|4.4|m|in|abbr=on}} single aperture. The first telescope was installed in 2016; construction was paused in 2019 due to insufficient funding{{cite conference|display-authors=3 |last1=Creech-Eakman |first1=Michelle J. |last2=Romero |first2=V. D. |last3=Haniff |first3=Christopher A. |last4=Buscher |first4=David F. |last5=Young |first5=J. S. |last6=Olivares |first6=Andres |last7=Ligon |first7=E. R. |last8=Payne |first8=I. |last9=Avila |first9=Bastian |last10=Blevins |first10=Sterling |last11=Chowdhury |first11=Naseef |last12=Collins |first12=Robert |last13=Dahl |first13=Chuck |last14=Das Roy |first14=Dipanjan |last15=Dooley |first15=J. |last16=Etscorn |first16=Dylan |last17=Etscorn |first17=Shelbi |last18=Farris |first18=Allen |last19=Fisher |first19=Martin |last20=Garcia |first20=Erica |last21=Gabaldon |first21=Mateo |last22=Gino |first22=Colleen |last23=Halder |first23=Ratna |last24=Hosseini |first24=Omid |last25=Jaynes |first25=Brandon |last26=Jencka |first26=Louis |last27=Johnston |first27=Perry |last28=Jojola |first28=Stephen |last29=Luis |first29=James |last30=Maes |first30=Jennie |last31=Martin |first31=William |last32=Matthews |first32=Tyler |last33=McKeen |first33=Cailyn |last34=Mohammadi |first34=Sina |last35=Mortimer |first35=Dan |last36=Norouzi |first36=Siavash |last37=Ochoa |first37=Danielle |last38=Panta |first38=Bhola |last39=Pino |first39=Juan |last40=Salayandia |first40=Isaac |last41=Salcido |first41=Chris |last42=Sanchez |first42=Amanda |last43=Santoro |first43=Fernando |last44=Seneta |first44=E. Bodie |last45=Sun |first45=X. |last46=Wilson |first46=Donald |last47=Wolfram |first47=Jeanette |title=Setting the stage for first fringes with the Magdalena Ridge Observatory Interferometer |conference=Optical and Infrared Interferometry and Imaging VII |series=Proceedings of the SPIE |volume=11446 |page=1144609 |date=13 December 2020 |doi=10.1117/12.2563173 |bibcode=2020SPIE11446E..09C |url=https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11446/2563173/Setting-the-stage-for-first-fringes-with-the-Magdalena-Ridge/10.1117/12.2563173.short |conference-url=https://www.spiedigitallibrary.org/conference-proceedings-of-SPIE/11446.toc|url-access=subscription }} and has not resumed.
  • Timau National Observatory, Indonesia – {{convert|3.8|m|in|sigfig=2|abbr=on}}. Construction expected to be completed by early 2025.{{Cite web|url=https://www.tempo.co/hiburan/observatorium-nasional-timau-di-ntt-segera-beroperasi-begini-potensi-wisatanya-12852|title=Observatorium Nasional Timau di NTT Segera Beroperasi, Begini Potensi Wisatanya|date=2024-09-04|website=tempo.co|language=id-ID|access-date=2025-01-04}}

=Proposed=

File:Comparison of LUVOIR-A and -B primary mirrors with Hubble and JWST.png, James Webb Space Telescope, and the proposed LUVOIR-B and LUVOIR-A.]]

Selected large telescopes which are in detailed design or pre-construction phases:

  • Large UV Optical Infrared Surveyor (LUVOIR), a proposed space telescope for launch in the mid 2030s.
  • MUltiplexed Survey Telescope (MUST), a 6.5 m spectroscopic survey telescope.{{cite journal|title= Conceptual design of the optical system of the 6.5m wide field multiplexed survey telescope with excellent image quality|journal=PhotoniX|year=2023|doi=10.1186/s43074-023-00094-4|number=4|page=16|last1=Zhang|first1=Yifan|last2=Jiang|first2=Haijiao|last3=Shectman|first3=Stephen|last4=Yang|first4=Dehua|last5=Cai|first5=Zheng|last6=Shi|first6=Yong|last7=Huang|first7=Song|last8=Lu|first8=Lu|last9=Zheng|first9=Yamin|last10=Kang|first10=Shaonan|last11=Mao|first11=Shude|last12=Huang|first12=Lei|volume=4 |s2cid=258766165 |doi-access=free |url=https://www.researchsquare.com/article/rs-2136738/latest.pdf}}
  • Chinese Giant Solar Telescope (CGST), an infrared and optical solar telescope, with light-gathering power equivalent to a 5 m diameter aperture.{{cite web |title=Introduction to the Chinese Giant Solar Telescope |url=http://www.ncra.tifr.res.in:8081/~basi/ASICS_2/031-Deng.pdf }}{{cite news |title=China Exclusive: Scientists looking for site for giant solar telescope |url=http://www.spacedaily.com/reports/China_Exclusive_Scientists_looking_for_site_for_giant_solar_telescope_999.html |access-date=8 December 2014 |author=Staff |date=29 August 2012 }}

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See also

References

{{reflist|colwidth=30em}}

Further reading

  • {{cite journal|bibcode=2004PASP..116...77R|title=The Historical Growth of Telescope Aperture|first=René|last=Racine|journal=Publications of the Astronomical Society of the Pacific|volume=116|issue=815|page=77|year=2004|doi=10.1086/380955|doi-access=free}}

External links

  • [http://abell.as.arizona.edu/~hill/list/bigtel99.htm List of large reflecting telescopes]
  • [http://astro.nineplanets.org/bigeyes.html The World's Largest Optical Telescopes]
  • [http://stjarnhimlen.se/bigtel/LargestTelescope.html Largest optical telescopes of the world]
  • [http://www.noao.edu/education/gsmt/intro Selected largest telescopes]
  • [http://articles.adsabs.harvard.edu//full/1884SidM....3..193P/0000193.000.html Sidereal Messenger Large refracting telescopes] (date 1884)

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Optical telescopes

Largest optical telescopes

Telescope