Which of the following best summarizes what we mean by dark energy?
A)It is a name given to whatever is causing the expansion of the universe to accelerate with time.
B)It is the energy contained in dark matter.
C)It is the energy of black holes.
D)It is a type of energy that is associated with the "dark side" of The Force that rules the cosmos.

Question

Quizplus · Accepted Answer

Dark energy is a term used to describe whatever is causing the expansion of the universe to accelerate with time. It is a mysterious force that is thought to exist in space and make up approximately 70% of the total energy density of the universe. It is different from dark matter, which is a form of matter that does not emit, absorb, or reflect light and is believed to be responsible for the gravitational effects that hold galaxies together. Dark energy, on the other hand, is thought to be a form of energy that permeates all of space and is causing the universe to expand at an accelerating rate.

Which of the Following Best Summarizes What We Mean by Dark