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Why can a protostar glow before nuclear fusion starts?

Answer and explanation

Correct answer: Because of heat produced by gravitational contraction

A protostar can glow due to heat from contraction. Exam tip: separately remember fusion for a stable star's energy.

Related tags

GeographyProtostarContractionStar FormationFormation Of PlanetsAnd Our Solar SystemStar Formation Formation Of Planets And Our Solar SystemThe Origin And Evolution Of The EarthClass 11 Mcq

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