What is the early phase of the star called once the gas and dust begin to coalesce?
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Answered on
All stars start as a nebula. A nebula is a large cloud of gas and dust. Gravity can pull
some of the gas and dust in a nebula together. The contracting cloud is then called a
protostar. A protostar is the earliest stage of a star’s life. A star is born when the gas
and dust from a nebula become so hot that nuclear fusion starts.