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 one year ago
According to the nebular hypothesis, when did nuclear fusion begin?
After the planets formed.
When the sun was 5 billion years old.
When the nebula first exploded outward into space
When particles were pulled together so tightly they combined.
 one year ago
According to the nebular hypothesis, when did nuclear fusion begin? After the planets formed. When the sun was 5 billion years old. When the nebula first exploded outward into space When particles were pulled together so tightly they combined.

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shreya.
 one year ago
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