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Student 1: According to the Hubble Law space is expanding. This means that other galaxies are...

Student 1: According to the Hubble Law space is expanding. This means that other galaxies are moving away from us. So our galaxy will never collide with the Andromeda Galaxy.

Student 2: All galaxies have their own intrinsic motions. Since the Hubble flow is constant, all those galaxies that are moving towards us will collide with our galaxy sooner or later.

  • Which student do you agree with? Discuss which parts of their statements you agree or disagree with?
    • Explain your reasoning.
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