What is the difference between dark energy and dark matter?

I've been reading many clever answers here about dark matter and dark energy that called my attention to this question. Since Einstein's theory relates matter and energy as different states of the same thing, is it valid to think about dark matter and dark energy in the same way? read more

• Dark energy is a form of energy, which is not detectable by ordinary detectors, whereas dark matter is a form of matter, which does not emit, reflect or scatter electromagnetic waves. read more

Dark matter and dark energy are the yin and yang of the cosmos. Dark matter produces an attractive force (gravity), while dark energy produces a repulsive force (antigravity). Together, they make up 96 percent of the universe—and we can’t see either. read more