The expansion of the universe takes place
A) only between objects separated by vacuum; as a result, human bodies do not expand, but the Earth-Moon system does.
B) between all objects, even between the atoms in human bodies, although the expansion of a person is too small to be measured reliably.
C) only over distances the size of a galaxy or larger; consequently, the Milky Way Galaxy expands, but the solar system does not.
D) primarily in the huge spaces between clusters of galaxies; "small" objects like galaxies or Earth do not expand.

Question

Quizplus · Accepted Answer

The expansion of the universe primarily occurs in the vast spaces between clusters of galaxies. This means that smaller structures, such as individual galaxies, solar systems, or planets like Earth, do not experience this expansion due to their gravitational binding.

The Expansion of the Universe Takes Place