sitstareplay6783 sitstareplay6783
  • 20-03-2018
  • Geography
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Given that our solar system is now about 4.6 billion years old, when will we need to start worrying about the sun running out of hydrogen for fusion?

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BadRat BadRat
  • 20-03-2018
not now or for next 10 million years or more thats for sure
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