What does Hubble's law tell us?
A)For every force, there is an equal and opposite reaction force.
B)The faster a spiral galaxy's rotation speed, the more luminous it is.
C)The more distant a galaxy, the faster it is moving away from us.
D)The longer the period of a Cepheid variable, the greater its luminosity.

Question

Quizplus · Accepted Answer

Hubble's law states that the velocity at which a galaxy is moving away from us is proportional to its distance from us, indicating that the more distant a galaxy, the faster it is moving away from us.

What Does Hubble's Law Tell Us