bipolar nebula

Though the exact causes of this nebular structure are not known, it is often thought to imply the presence of a binary central star with a period of a few days to a few years. As one of the two stars expelled its outer layers, the other disrupted the outflow of material to form the bipolar shape.Binary Progenitor Models for Bipolar Planetary Nebulae, Soker 1998, ApJ, 496, 833

File:Planetary Nebula M2-9.jpg, otherwise known as the Twin Jet Nebula or the Wings of a Butterfly Nebula, is a bipolar nebula.]]

• Homunculus Nebula around Eta Carinae[http://hubblesite.org/newscenter/newsdesk/archive/releases/1996/23/image/a NewsCenter – Doomed Star Eta Carinae (06/10/1996) – Release Images]. HubbleSite (10 June 1996). Retrieved on 26 November 2010.{{Cite APOD |date=12 July 1995 |title=Eta Carinae Before Explosion |access-date=2010-11-26}}{{Cite APOD |date=26 March 2006 |title=Doomed Star Eta Carinae |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/E/Eta_Carinae_Nebula.html Eta Carinae Nebula (NGC 3372)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• Hubble 5HubbleSite – NewsCenter – [http://hubblesite.org/newscenter/newsdesk/archive/releases/1997/38/image/f Hubble Witnesses the Final Blaze of Glory of Sun-Like Stars ](12/17/1997) – Release Images
• M2-9 – The Wings of a Butterfly Nebula{{Cite APOD |date=12 June 2005 |title=M2 9: Wings of a Butterfly Nebula |access-date=2010-11-26}}{{Cite APOD |date=21 October 1997 |title=The Butterfly Planetary Nebula |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/B/Butterfly_Nebula.html Butterfly Nebula (M 2-9)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• OH231.8+4.2 – The Calabash Nebula or Rotten Egg Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/1999/39/ NewsCenter – The "Rotten Egg" Nebula: A Planetary Nebula in the Making (10/19/1999) – Introduction]. HubbleSite (19 October 1999). Retrieved on 26 November 2010.[http://antwrp.gsfc.nasa.gov/apod/ap991101.html APOD: 1 November 1999 – The Rotten Egg Planetary Nebula]. Antwrp.gsfc.nasa.gov (1 November 1999). Retrieved on 26 November 2010.{{Cite APOD |date=3 September 2001 |title=The Making of the Rotten Egg Nebula |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/C/Calabash_Nebula.html Calabash Nebula (OH231.8+4.2)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• Mz3 (or Menzel 3) – The Ant Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/2001/05/ NewsCenter – Astro-Entomology? Ant-like Space Structure Previews Death of Our Sun (02/01/2001) – Introduction]. HubbleSite (1 February 2001). Retrieved on 26 November 2010.{{Cite APOD |date=1 May 2005 |title=Planetary Nebula Mz3: The Ant Nebula |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/A/Ant_Nebula.html Ant Nebula (Menzel 3)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• CRL 618 – The Westbrook Nebula{{cite journal |last1=Tafoya |first1=D. |last2=Loinard |first2=L. |last3=Vlemmings |first3=W.H.T. |last4=Marti-Vidal |first4=I. |last5=Pech |first5=G. |title=Rapid angular expansion of the ionized core of CRL 618 |journal=Astronomy and Astrophysics |date=22 July 2013 |volume=556 |pages=A35 |doi=10.1051/0004-6361/201321704 |url=https://www.aanda.org/articles/aa/pdf/2013/08/aa21704-13.pdf |accessdate=15 November 2020|doi-access=free }}
• CRL 2688 – The Egg Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/1996/03/ NewsCenter – Hubble Finds Searchlight Beams and Multiple Arcs around a Dying Star (01/16/1996) – Introduction]. HubbleSite (16 January 1996). Retrieved on 26 November 2010.{{Cite APOD |date=26 June 1999 |title=Shells in the Egg Nebula |access-date=2010-11-26}}{{Cite APOD |date=9 April 2003 |title=The Egg Nebula in Polarized Light |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/E/Egg_Nebula.html Egg Nebula (CRL 2688)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• HD 44179 – The Red Rectangle Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/2004/11/image/a NewsCenter – Dying Star Sculpts Rungs of Gas and Dust (05/11/2004) – Release Images]. HubbleSite (11 May 2004). Retrieved on 26 November 2010.{{Cite APOD |date=13 May 2004 |title=Rungs of the Red Rectangle |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/R/Red_Rectangle.html Red Rectangle]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• MyCn18 – The Engraved Hourglass Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/1996/07/image/a NewsCenter – Hubble Finds an Hourglass Nebula around a Dying Star (01/16/1996) – Release Images]. HubbleSite (16 January 1996). Retrieved on 26 November 2010.{{Cite APOD |date=18 January 1996 |title=MyCn18: An Hourglass Nebula |access-date=2010-11-26}}{{Cite APOD |date=15 June 2002 |title=MyCn18: An Hourglass Nebula |access-date=2010-11-26}}{{Cite APOD |date=9 February 1996 |title=The Eye of an Hourglass Nebula |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/H/Hourglass_Nebula.html Hourglass Nebula (MyCn 18)]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• {{Proper name|He2-104}} – The Southern Crab Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/1999/32/image/a NewsCenter – Symbiotic Star Blows Bubbles into Space (08/24/1999) – Release Images]. HubbleSite (24 August 1999). Retrieved on 26 November 2010.{{Cite APOD |date=31 August 1999 |title=Symbiotic Star Bubbles |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/S/Southern_Crab_Nebula.html Southern Crab Nebula (He2-104)] {{Webarchive|url=https://web.archive.org/web/20061009224831/http://www.daviddarling.info/encyclopedia/S/Southern_Crab_Nebula.html |date=9 October 2006 }}. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• The Boomerang Nebula[http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/25/image/a NewsCenter – Hubble Catches Scattered Light from the Boomerang Nebula (09/13/2005) – Release Images]. HubbleSite (13 September 2005). Retrieved on 26 November 2010.{{Cite APOD |date=14 September 2005 |title=The Boomerang Nebula in Polarized Light |access-date=2010-11-26}}{{Cite APOD |date=20 February 2003 |title=Cold Wind from the Boomerang Nebula |access-date=2010-11-26}}{{Cite APOD |date=15 October 1997 |title=Cold Wind From The Boomerang Nebula |access-date=2010-11-26}}[http://www.daviddarling.info/encyclopedia/B/Boomerang_Nebula.html Boomerang Nebula]. Daviddarling.info (1 February 2007). Retrieved on 26 November 2010.
• NGC 2346 – Also known as the Butterfly Nebula[http://antwrp.gsfc.nasa.gov/apod/ap011028.html APOD: 28 October 2001 – NGC 2346: A Butterfly-Shaped Planetary Nebula]
• NGC 6302 – The Bug or Butterfly Nebula
• KjPn 8 Nebula – The largest (in angular size) bipolar planetary nebula.{{cite journal |last1=López |first1=J.A |last2=Vazquez |first2=R. |last3=Rodriguez |first3=L.F. |title=The discovery of a bipolar, rotating, episodic jet (BRET) in the planetary nebula KjPn 8 |journal=The Astrophysical Journal |date=10 December 1995 |volume=455 |pages=L63–L66 |doi=10.1086/309801 |doi-access= }}

{{reflist|30em}}

• Bipolar outflow
• Stellar evolution

{{Nebula}}

{{DEFAULTSORT:Bipolar Nebula}}

Category:Nebulae