The conversation between human and AI assistant.
Why is the rate of the expansion of the universe accelerating?
How is dark energy different from dark matter?
Dark energy and dark matter are two different hypothetical components of the universe. Dark matter is a form of matter that is believed to interact with gravity but not with light, while dark energy is a form of energy that is believed to permeate all of space and cause the acceleration of the universe's expansion. Dark matter is thought to make up around 27% of the universe's energy, while dark energy makes up around 68%.