What is the relationship between distance and velocity of galaxies?
The greater the distance from Earth, the greater the recessional velocity.
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What does Hubble's law state?
Hubble's law states that the recessional velocity of distant galaxies is proportional to their distance from Earth.
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What is the formula for Hubble's law?
v = Ho x d,
where:
v = recessional velocity of a galaxy
Ho = Hubble's constant
d = distance from Earth.
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How do we know that galaxies are moving away from Earth?
Light from distant galaxies is red-shifted.
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