When astronomers look out at our universe, they see all
A) other planets moving away from us.
B) other galaxies moving away from us.
C) asteroids moving toward us.
D) supernovas moving away from us.
E) other galaxies moving toward us.

Question

Quizplus · Accepted Answer

Astronomers observe other galaxies moving away from us, which is evidence for the expansion of the universe. Other planets in our own solar system do not show significant motion relative to us, and asteroids and supernovas do not provide evidence for the overall motion of the universe. While there are some individual galaxies that are moving towards us, on average the motion is away from us, hence Option E is not correct.

When Astronomers Look Out at Our Universe, They See All