For at least the past few billion years, the rate of expansion of the universe has
A) been slowing down
B) slowed down and stopped
C) been speeding up
D) remained steady

Question

Quizplus · Accepted Answer

The rate of expansion of the universe has been found to be accelerating in recent times, meaning it is currently speeding up. This was initially discovered through observations of distant supernova explosions in the late 1990s and has been further supported by measurements of the cosmic microwave background radiation and large-scale structures.

For at Least the Past Few Billion Years, the Rate