Recall that Hubble's law is written v = H0d, where v is the recession velocity of a galaxy located a distance d away from us, and H0 is Hubble's constant. Suppose H0 = 20 km/s/Mly. How fast would a galaxy 1000 Mly distant be receding from us?
A)20 Mly/s
B)20,000 km/s
C)0)20 times the speed of light
D)50 km/s
E)20 km/s

Question

Quizplus · Accepted Answer

Using Hubble's law, v = H0d, with H0 = 20 km/s/Mly and d = 1000 Mly, the recession velocity v = 20 km/s/Mly * 1000 Mly = 20,000 km/s.

Recall That Hubble's Law Is Written V = H0d, Where