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What causes interstellar dust and gas to start to contract and form a protostar? 1) the shockwave from a supernova 2) nearby black hole 3) an increase in the solar wind 4) nuclear fusion
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What causes interstellar dust and gas to start to contract and form a protostar?

1) the shockwave from a supernova


2) nearby black hole


3) an increase in the solar wind


4) nuclear fusion

User GuilleOjeda
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The shockwave from a supernova
User Deponovo
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