Galaxies move away from us in all directions because
A) the force of gravity strengthens with distance.
B) the force of gravity weakens with distance.
C) space is expanding.
D) our galaxy has expelled all other galaxies.

Question

Quizplus · Accepted Answer

The most widely accepted explanation for galaxies moving away from us in all directions is that space itself is expanding. This means that the distance between any two points in space is increasing over time. This expansion is commonly visualized as dots on a balloon; as the balloon inflates, all of the dots get farther away from one another. Similarly, all galaxies are moving away from each other as the universe expands.

Galaxies Move Away from Us in All Directions Because