+A **protostar** is a dense cloud of interstellar [Gas](/wiki/gas) and [Dust](/wiki/dust) undergoing gravitational collapse. This early stage will eventually lead to the birth of a [Star](/wiki/star) as its core heats from increasing pressure, but nuclear fusion has not yet begun.
+## See also
+- [Star Formation](/wiki/star-formation)
+- [Nebula](/wiki/nebula)
+- [Stellar Evolution](/wiki/stellar-evolution)
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