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According to Hubble's Law the velocity v of a galaxy moving away from Earth is proportional...

According to Hubble's Law the velocity v of a galaxy moving away from Earth is proportional to its distance from Earth. Consider two galaxies one of which is twice as far away as the other from Earth at some instant of time (i.e. the ratio of their distances from Earth is 2 to 1). At subsequent times the ratio of their distances to Earth will be:

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