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•Question 3 (1 point) If Galaxy A is four
times more distant than
Galaxy B, then according to the
Hubble Law, the recessional velocity of Galaxy A is larger than that of Galaxy B by what factor?
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•Four. The Hubble Law (v = Hd) is linear. Double the distance, the velocity must also be doubled.
You can also solve this explicitly using the equation twice, once for galaxy
A, once for B,
and taking the ratio to show that VA/VB = dA/dB = 4 (H cancels out since it is a constant).
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