User:Dannythysicist/sandbox

Dark energy, is an energy that affects the whole universe. And it is thought that this is what makes the universe progressively get larger. Dark energy can not be seen because this as well as dark matter does not interact with baryonic matter so it is invisible to light. The first sign of dark energy's existence came from what are called supernovae measurements that showed that the universe does not expand at a constant rate actually the expansion of the universe is accelerating.also dark energy makes up 68% of the universe. Dark matter. Dark matter is made up of particles that do not absorb,reflect or emit light any light so dark matter can not be seen but we know it's there because of all the effects it has on objects and many other things we can see. Dark matter makes up 27% of the entire universe. Normal matter or baryonic matter can be broken into subatomic particles called leptons and normal matter makes up 5% of the universe.