Question

1. which of these facts is supporting evidence that the universe is expanding? the galaxies are moving away from each other. the galaxies can spin to form eddies. the stars vary in chemical composition. the universe is filled with galaxies of different sizes.

Explanation:

The expansion of the universe is supported by the observation that galaxies are moving away from each other, a key concept in cosmology. This is known as Hubble's law. The other options do not directly relate to evidence of the universe's expansion.

Answer:

The galaxies are moving away from each other.