Changes

==Properties==

==Properties==

The two types of diffuse nebula depend on whether the [[light]] emitted from the nebula is produced when excited atoms decay or instead light is reflected. Emission nebulae produce light from the decay of excited atoms. They contain large hot [[star]]s that emit large amounts of high energy radiation. This can excite the surrounding gas, which then re-emits this radiation later when atoms return to a lower energy state.<ref name=seds/> On the other hand, reflection nebulae reflect the light that interacts with [[dust]] particles. This leads reflection nebula to often have a white/blue appearance. Furthermore, diffuse nebulae can be a mixture of both emission and reflection, an example being the [[Triffid nebula]].

The two types of diffuse nebula depend on whether the [[light]] emitted from the nebula is produced when excited atoms decay or instead light is reflected. Emission nebulae produce light from the decay of excited atoms. They contain large hot [[star]]s that emit large amounts of high energy radiation. This can excite the surrounding gas, which then re-emits this radiation later when atoms return to a lower energy state.<ref name=seds/> On the other hand, reflection nebulae reflect the light that interacts with [[dust]] particles. This leads reflection nebula to often have a white/blue appearance. Furthermore, diffuse nebulae can be a mixture of both emission and reflection, an example being the [[Trifid nebula]].

===Emission Nebulae===

===Emission Nebulae===