What is dark energy?

Question

Quizplus · Accepted Answer

Dark energy is the theoretical energy required to explain the accelerating expansion of the universe, which cannot be accounted for by the observed matter and energy in the universe. It is needed to bridge the gap between the energy we see or infer and the energy needed to make the universe flat. Option A describes energy associated with a black hole while option C describes energy associated with dark matter. Option D describes the need for unseen matter-energy to explain the curvature of space, which is not related to dark energy.

What Is Dark Energy