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What is the most important difference between a protostar and a main sequence star?

Answer and explanation

Correct answer: Stable hydrogen fusion has begun in a main sequence star

A protostar is still contracting while fusion is stable in the main sequence. Exam tip: treat fusion as the mark of the main sequence.

Related tags

ProtostarMain SequenceHydrogen FusionStar FormationFormation Of PlanetsAnd Our Solar SystemStar Formation Formation Of Planets And Our Solar SystemThe Origin And Evolution Of The EarthGeographyClass 11 Mcq

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