What is our current understanding of the expansion of the universe?
A) The universe is expanding too slowly to overcome its mutual gravitational attraction, and thus it will eventually stop expanding and eventually collapse.
B) The universe is expanding at exactly its escape speed. Thus, it will continue to slow forever and stop at an infinite time in the future.
C) The universe is expanding at a rate greater than its escape speed. Thus, it will continue to expand forever, slowing constantly, without ever stopping.
D) None of the answers is correct.

Question

Quizplus · Accepted Answer

Current understanding, based on observations such as those of distant supernovae and the cosmic microwave background, suggests that the universe's expansion is accelerating, not slowing down. This is attributed to dark energy, which is not accounted for in the given options.

What Is Our Current Understanding of the Expansion of the Universe