For which objects in the universe has the Hubble relation been shown to hold experimentally?
A) galaxies in the Local Group, in the near vicinity of the Milky Way
B) stars in the Milky Way in the near neighborhood of the Sun
C) distant galaxies
D) stars in the distant spiral arms of the Milky Way Galaxy

Question

Quizplus · Accepted Answer

The Hubble relation, which describes the proportional relationship between the distances of galaxies and their recessional velocities (implying the universe is expanding), has been experimentally shown to hold for distant galaxies. This relationship does not apply to stars within the Milky Way or galaxies in the Local Group due to their gravitational interactions with each other, which dominate over the expansion of the universe at these scales.

For Which Objects in the Universe Has the Hubble Relation