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'''HH-47''' is a [[Herbig-Haro object]] in the [[constellation]] of [[Vela]].<ref name=jpl>{{cite web|url=https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA04939|title=Embedded Outflows from Herbig-Haro 46/47|accessdate=2019-11-25|publisher=jpl.nasa.gov|date=2003-112-18}}</ref> The object is 4.83 trillion km long (about ten times larger than the [[Solar system]]) and is situated 1,140 [[light year]]s from [[Earth]], near the [[Gum nebula]].<ref name=annesastronomy/>  

'''HH-47''' is a [[Herbig-Haro object]] in the [[constellation]] of Vela.<ref name=jpl>{{cite web|url=https://www.jpl.nasa.gov/spaceimages/details.php?id=PIA04939|title=Embedded Outflows from Herbig-Haro 46/47|accessdate=2019-11-25|publisher=jpl.nasa.gov|date=2003-112-18}}</ref> The object is 4.83 trillion km long (about ten times larger than the [[Solar system]]) and is situated 1,140 [[light year]]s from [[Earth]], near the [[Gum nebula]].<ref name=annesastronomy/>  

THe nebula consists of a central [[star]] inside a Bok globule, a [[dark nebula]] that contains stars, which is ejecting gas at supersonic speeds of 100 to 1000 kilometers per second.<ref name=annesastronomy/> This gas is ejected along the rotational axis of the star producing a "bipolar outflow" of material. The shock of this material colliding with other gas causes it to glow. The complicated gas patterns suggest the star may be wobbling, possibly due to the [[gravity|gravitational pull]] of a smaller companion star. Various compounds such as [[water]] and [[carbon dioxide]] ices, as well as [[organic chemistry|organic molecules]] such as aromatic [[hydrocarbon]]s.<ref name=jpl/>

THe nebula consists of a central [[star]] inside a Bok globule, a [[dark nebula]] that contains stars, which is ejecting gas at supersonic speeds of 100 to 1000 kilometers per second.<ref name=annesastronomy/> This gas is ejected along the rotational axis of the star producing a "bipolar outflow" of material. The shock of this material colliding with other gas causes it to glow. The complicated gas patterns suggest the star may be wobbling, possibly due to the [[gravity|gravitational pull]] of a smaller companion star. Various compounds such as [[water]] and [[carbon dioxide]] ices, as well as [[organic chemistry|organic molecules]] such as aromatic [[hydrocarbon]]s.<ref name=jpl/>