[[Image:MutaraNebula.JPG|thumb|right|<center>Mutara Nebula]]
:''You may be looking for the [[:Category:Nebulae|Category "Nebulae"]]''
A '''nebula''' is an interstellar cloud of [[matter]], usually gases (such as hydrogen) and dust. Many nebulae are [https://www.space.com/39935-stellar-nursery-unites-star-formation-theories.html stellar nurseries].
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[[Category:NebulaeCartography]]
[[category: science]]