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The '''Frosty Leo nebula''' (IRAS 09371+1212) is a [[protoplanetary nebula]], one of the rarest types of [[nebulae]].<ref name=spacetelescope>{{cite web|url=https://www.spacetelescope.org/images/potw1149a/|title=The frosty Leo Nebula|accessdate=2018-10-05}}</ref> Its name derives from the fact it contains a lot of [[water]] in the form of [[ice|ice grains]] due to the low temperature and is situated in [[constellation]] of [[Leo]], the [[lion]]. The nebula is unusual in that it is not located close to the plane of our [[galaxy]], the [[Milky Way]] and so is not partially obscured by dust clouds or other nebulae. This means its complex structure can be observed in great detail.

The '''Frosty Leo nebula''' (IRAS 09371+1212) is a protoplanetary nebula, one of the rarest types of [[nebulae]].<ref name=spacetelescope>{{cite web|url=https://www.spacetelescope.org/images/potw1149a/|title=The frosty Leo Nebula|accessdate=2018-10-05}}</ref> Its name derives from the fact it contains a lot of [[water]] in the form of [[ice|ice grains]] due to the low temperature and is situated in [[constellation]] of [[Leo]], the [[lion]]. The nebula is unusual in that it is not located close to the plane of our [[galaxy]], the [[Milky Way]] and so is not partially obscured by dust clouds or other nebulae. This means its complex structure can be observed in great detail.

There is some variation in the distance to the nebula, with some sources placing it a 3,000 [[light year]]s, other considerably higher at 6,800 ly.<ref name=dist/><ref name=spacetelescope/> The luminosity is thought to be around 179±25 times greater than that of the [[Sun]]. The nebula is believed to have a temperature of 75±4 kelvin.<ref name=dist/> Its structure comprises a spherical halo and disc that surround a central [[star]], as well as enormous loops and lobes of gas.

There is some variation in the distance to the nebula, with some sources placing it a 3,000 [[light year]]s, other considerably higher at 6,800 ly.<ref name=dist/><ref name=spacetelescope/> The luminosity is thought to be around 179±25 times greater than that of the [[Sun]]. The nebula is believed to have a temperature of 75±4 kelvin.<ref name=dist/> Its structure comprises a spherical halo and disc that surround a central [[star]], as well as enormous loops and lobes of gas.