Does Hubble's law work well for galaxies in the Local Group? Why or why not?
A)No, because Hubble did not know the Local Group existed when he discovered his law.
B)No, because we do not know the precise value of Hubble's constant.
C)No, because galaxies in the Local Group are gravitationally bound together.
D)Yes, it works so well that we have never detected any measurable deviations from its predictions.

Question

Quizplus · Accepted Answer

Galaxies in the Local Group are gravitationally bound to each other, which means that their motion cannot be described by Hubble's law. Therefore, Hubble's law does not work well for galaxies in the Local Group.

Does Hubble's Law Work Well for Galaxies in the Local