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If universe is expanding with the velocity of light then why the distance between earth and sun is constant? Also why the distance from one Galaxy to another remains constant? And so on...

Qmechanic
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Large Hadron
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1 Answers1

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If you are close enough, the force of gravity can overcome the Hubble Expansion, It is then said that you are "gravitationally bound".

Also why the distance from one Galaxy to another remains constant?

You can't say this at all:

  1. You have to specify which two galaxies you are talking about. If they are close enough to each other, they are gravitationally bound and not subject to the Hubble Expannsion If they are far enough away from each other, then they are not gravitationally bound a subject to the Hubble Expansion.
  2. Furthermore, You can't even say that the distances between gravitationally bound galaxies remains the same. The Andromeda galaxy is moving towards the Milky Way.
DKNguyen
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