Future Space Exploration

Which planet could be considered the most important to life on Earth?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. Without Jupiter, you could kiss our mother planet goodbye. Jupiter is our solar system's hulking bodyguard. It's so massive that its gravity attracts and breaks up many comets and asteroids as they enter the inner solar system -- and before they could do damage to life on Earth. It's a good thing, too because one collision between Earth and a massive asteroid and we could go the way of the T-Rex.

    More answers from Discovery Channel »

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