Around 1929,Hubble and other astronomers discovered that the light of distant galaxies displayed red shifts relative to the light of nearby stars.This means that ___________________.
A) all distant galaxies are moving away from the Milky Way galaxy
B) these galaxies are moving away from a fixed light source
C) the whole Universe is expanding
D) All of the above are correct.
E) Both a and c are correct.

Question

Quizplus · Accepted Answer

The observed red shifts indicate that distant galaxies are moving away from us, which suggests that the Universe is expanding. This is consistent with the Big Bang theory which proposes that the Universe began as a single point and has been expanding since then. Therefore, choices A and C are correct. Choice B is incorrect because the galaxies are not moving away from a fixed light source, but rather from us, the observer. Choice D is incorrect because choice B is incorrect.

Around 1929,Hubble and Other Astronomers Discovered That the Light of Distant