If a galaxy has an apparent velocity of 700 km/s, what is its distance if the Hubble constant is assumed to be 70 km/s/Mpc?
A) 10 Mpc
B) 70 Mpc
C) 100 Mpc
D) 700 Mpc
E) 1,000 Mpc

Question

Quizplus · Accepted Answer

The distance to the galaxy can be calculated using Hubble's Law: velocity = Hubble constant × distance. Rearranging gives distance = velocity / Hubble constant = 700 km/s / 70 km/s/Mpc = 10 Mpc.

If a Galaxy Has an Apparent Velocity of 700 Km/s