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Created page with "{{Night Sky | image = | designation = | rightascension =21<sup>h</sup> 02<sup>m</sup> 18.27<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.f..."
{{Night Sky
| image =
| designation =
| rightascension =21<sup>h</sup> 02<sup>m</sup> 18.27<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=egg+nebula&submit=submit+id|title=Egg nebula|accessdate=2019-08-03|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}
</ref>
| declination =+36° 41′ 37.0″<ref name=simbad/>
| distance =1,892 ly<ref name=dist>{{cite journal
|last1=Vickers |first1=S.
|last2=Frew |first2=D.
|last3=Parker |first3=Q.
|last4=Bojičić |first4=I.
|display-authors=3
|title=New light on Galactic post-asymptotic giant branch stars – I. First distance catalogue
|journal=Monthly Notices of the Royal Astronomical Society
|volume=447
|issue=2|page=1673-1691|date=2015
|doi=10.1093/mnras/stu2383
|bibcode=2015MNRAS.447.1673V
|ref=harv
}} {{arXiv|1403.7230}}</ref>
| constellation =Cygnus
| type =Protoplanetary nebula
| dimensions =
| magnitude =
| redshift =
| radvelocity =
| propmotion =
| parallax =
}}
The '''Egg nebula''' (RAFGL 2688, CRL 2688) is a [[protoplanetary nebula]] in the [[constellation]] of [[Cygnus]], the [[swan]].<ref name=nasa>{{cite web|url=https://www.nasa.gov/multimedia/imagegallery/image_feature_787.html|title=The Egg Nebula|accessdate=2019-08-03|publisher=nasa.gov}}</ref> It was the first type of protoplanetary nebula to be observed.<ref name=esa>{{cite web|url=https://www.esa.int/spaceinimages/Images/2019/04/Understanding_the_Egg_Nebula|title=Understanding the Egg Nebula|accessdate=2019-08-03|date=2019-04-15|publisher=esa.int}}</ref>
The nebula is around one [[light year]] across and is shedding large shells composed of dust and gas. Light from the nebula is [[Polarized light|polarized]] and this give clues as to the source of the light in the nebula. There is believed to be a star at the nebula's core, surrounded and obscured by dust. The light beams emanating from it are though to be visible due to holes in this dust cloud caused by outgoing jets. The gas is expanding at a rate of 20 km/s or 115,000 mph.<ref name=esa/> It is thought to have a [[luminosity]] 6,000 times larger than the [[Sun]] and a temperature lying somewhere in the range of 186-401 kelvin.
==References==
{{reflist}}
{{Nebulae}}
[[Category:Astronomy]]
[[Category:Nebulae]]
| image =
| designation =
| rightascension =21<sup>h</sup> 02<sup>m</sup> 18.27<sup>s</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=egg+nebula&submit=submit+id|title=Egg nebula|accessdate=2019-08-03|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}
</ref>
| declination =+36° 41′ 37.0″<ref name=simbad/>
| distance =1,892 ly<ref name=dist>{{cite journal
|last1=Vickers |first1=S.
|last2=Frew |first2=D.
|last3=Parker |first3=Q.
|last4=Bojičić |first4=I.
|display-authors=3
|title=New light on Galactic post-asymptotic giant branch stars – I. First distance catalogue
|journal=Monthly Notices of the Royal Astronomical Society
|volume=447
|issue=2|page=1673-1691|date=2015
|doi=10.1093/mnras/stu2383
|bibcode=2015MNRAS.447.1673V
|ref=harv
}} {{arXiv|1403.7230}}</ref>
| constellation =Cygnus
| type =Protoplanetary nebula
| dimensions =
| magnitude =
| redshift =
| radvelocity =
| propmotion =
| parallax =
}}
The '''Egg nebula''' (RAFGL 2688, CRL 2688) is a [[protoplanetary nebula]] in the [[constellation]] of [[Cygnus]], the [[swan]].<ref name=nasa>{{cite web|url=https://www.nasa.gov/multimedia/imagegallery/image_feature_787.html|title=The Egg Nebula|accessdate=2019-08-03|publisher=nasa.gov}}</ref> It was the first type of protoplanetary nebula to be observed.<ref name=esa>{{cite web|url=https://www.esa.int/spaceinimages/Images/2019/04/Understanding_the_Egg_Nebula|title=Understanding the Egg Nebula|accessdate=2019-08-03|date=2019-04-15|publisher=esa.int}}</ref>
The nebula is around one [[light year]] across and is shedding large shells composed of dust and gas. Light from the nebula is [[Polarized light|polarized]] and this give clues as to the source of the light in the nebula. There is believed to be a star at the nebula's core, surrounded and obscured by dust. The light beams emanating from it are though to be visible due to holes in this dust cloud caused by outgoing jets. The gas is expanding at a rate of 20 km/s or 115,000 mph.<ref name=esa/> It is thought to have a [[luminosity]] 6,000 times larger than the [[Sun]] and a temperature lying somewhere in the range of 186-401 kelvin.
==References==
{{reflist}}
{{Nebulae}}
[[Category:Astronomy]]
[[Category:Nebulae]]