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{{Night Sky
| image =
| designation =GUM 16<br/>SNR G263.9-03.3
| rightascension =08<sup>h</sup> 33<sup>m</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GUM+16&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id|title=GUM 16|accessdate=2019-09-20|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}
</ref>
| declination =-44° 06′<ref name=simbad/>
| distance =800 ly<ref name=apod>{{cite web|url=https://apod.nasa.gov/apod/ap190110.html|title=Vela Supernova Remnant|accessdate=2018-09-25|publisher=apod.nasa.gov|date=2019-01-10}}</ref>
| constellation =Vela
| type =Supernova{{!}}Supernova remnant
| dimensions =8°<ref name=nasa>{{cite web|url=https://www.nasa.gov/mission_pages/chandra/multimedia/vela2012.html|title=Vela Pulsar|accessdate=2019-09-20|publisher=nasa.gov}}</ref>
| magnitude =
| redshift =
| radvelocity =
| propmotion =
| parallax =
}}
The '''Vela supernova remnant''' (GUM 16, SNR G263.9-03.3) is a [[supernova]] remnant in the [[constellation]] of [[Vela]].<ref name=apod/> The nebula's structure consists of a central [[pulsar]] surrounded by glowing filaments of hot [[gas]]. It is thought by some that the Vela supernova remnant is embedded in an older supernova remnant known as the [[Gum nebula]].<ref name=apod/> The nebula is believed to lie around 800 [[light year]]s away.<ref name=apod/> At this distance, its apparent size of 8° corresponds to a physical size of 0.31 ly.<ref>By direct calculation using distance of 800 ly and angular size of 8°.</ref>
The Vela pulsar (sometimes referred to as Vela X) is a rapidly rotating [[neutron star]], and as such is extremely dense.<ref name=nasa/> Observed by [[NASA]]'s [[Chandra Observatory]], it is approximately 12 miles in diameter and completes 11 revolutions per second. This means the outer parts of its surface are travelling at 80% the speed of light.<ref name=nasa/> The star has been seen to be emitting jets of particles moving a great speed from its poles. These appear similar to a rotating [[helix]], suggesting the pulsar precesses (or wobbles) as it spins.<ref name=nasa/>
==References==
{{reflist}}
{{Nebulae}}
[[Category:Astronomy]]
[[Category:Nebulae]]
Created page with " {{Night Sky | image = | designation =GUM 16<br/>SNR G263.9-03.3 | rightascension =08<sup>h</sup> 33<sup>m</sup><ref name=simbad>{{cite web|url=http://simbad.u-..."
{{Night Sky
| image =
| designation =GUM 16<br/>SNR G263.9-03.3
| rightascension =08<sup>h</sup> 33<sup>m</sup><ref name=simbad>{{cite web|url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=GUM+16&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id|title=GUM 16|accessdate=2019-09-20|work=Simbad Astronomical Database|publisher=simbad.u-strasbg.fr}}
</ref>
| declination =-44° 06′<ref name=simbad/>
| distance =800 ly<ref name=apod>{{cite web|url=https://apod.nasa.gov/apod/ap190110.html|title=Vela Supernova Remnant|accessdate=2018-09-25|publisher=apod.nasa.gov|date=2019-01-10}}</ref>
| constellation =Vela
| type =Supernova{{!}}Supernova remnant
| dimensions =8°<ref name=nasa>{{cite web|url=https://www.nasa.gov/mission_pages/chandra/multimedia/vela2012.html|title=Vela Pulsar|accessdate=2019-09-20|publisher=nasa.gov}}</ref>
| magnitude =
| redshift =
| radvelocity =
| propmotion =
| parallax =
}}
The '''Vela supernova remnant''' (GUM 16, SNR G263.9-03.3) is a [[supernova]] remnant in the [[constellation]] of [[Vela]].<ref name=apod/> The nebula's structure consists of a central [[pulsar]] surrounded by glowing filaments of hot [[gas]]. It is thought by some that the Vela supernova remnant is embedded in an older supernova remnant known as the [[Gum nebula]].<ref name=apod/> The nebula is believed to lie around 800 [[light year]]s away.<ref name=apod/> At this distance, its apparent size of 8° corresponds to a physical size of 0.31 ly.<ref>By direct calculation using distance of 800 ly and angular size of 8°.</ref>
The Vela pulsar (sometimes referred to as Vela X) is a rapidly rotating [[neutron star]], and as such is extremely dense.<ref name=nasa/> Observed by [[NASA]]'s [[Chandra Observatory]], it is approximately 12 miles in diameter and completes 11 revolutions per second. This means the outer parts of its surface are travelling at 80% the speed of light.<ref name=nasa/> The star has been seen to be emitting jets of particles moving a great speed from its poles. These appear similar to a rotating [[helix]], suggesting the pulsar precesses (or wobbles) as it spins.<ref name=nasa/>
==References==
{{reflist}}
{{Nebulae}}
[[Category:Astronomy]]
[[Category:Nebulae]]