What might be causing the universe to accelerate?

Name: What might be causing the universe to accelerate?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Observations of distant supernovae in the late 1990s indicated that the universe's expansion is accelerating rather than slowing down, which would normally be expected due to gravity. This acceleration is believed to be caused by a mysterious form of energy called dark energy, which is thought to make up about 68% of the total energy in the universe.

What Might Be Causing the Universe to Accelerate