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Q&A What would it feel like on the surface of a planet while it collides with another planet?

Let's say that something horrible has happened and a Mars-sized planet is knocked out of orbit and is hurtling towards an Earth-sized planet. How much time will they have? How will this affect the ...

10 answers  ·  posted 8y ago by Danny Reagan‭  ·  last activity 7y ago by Danny Reagan‭

Question astronomy planets physics