The fact that the universe is expanding means that space itself is growing within
A)the Milky Way.
B)clusters of galaxies.
C)the observable universe.
D)the Local Group.

Question

Quizplus · Accepted Answer

The expansion of the universe is observed by the fact that distant galaxies appear to be moving away from us, and this effect is observed uniformly throughout the observable universe. Therefore, the expansion of space is occurring within the entire observable universe, not just within a single galaxy (A), group of galaxies (D), or cluster of galaxies (B).

The Fact That the Universe Is Expanding Means That Space