What would you predict for the recession velocity of a galaxy whose distance (measured with the help of Type Ia supernovae) is 42 Mpc? Note that the Hubble constant has a value of
70 km/s/Mpc.
A) 2,940 km/s
B) 1.42 km/s
C) 205,800 km/s
D) 25,000 km/s
E) 386 km/s

Question

Quizplus · Accepted Answer

The recession velocity of a galaxy can be calculated using Hubble's Law: velocity = Hubble constant × distance. Here, velocity = 70 km/s/Mpc × 42 Mpc = 2,940 km/s.

What Would You Predict for the Recession Velocity of a Galaxy