Universe
Composition of the Universe
| Dark Matter | Atom | Dark Energy | Photon | Neutrino | |
|---|---|---|---|---|---|
13.8 Billion Years Ago |
63% |
12% |
15% |
10% |
|
Today |
26.8% |
4.9% |
68.3% |
Facts
-
Approximately ~73% of the mass of the visible universe is in the form of Hydrogen. Helium makes up about 25% of the mass, and everything else represents only 2%.