| The Big Rip | A theory that predicts that as the universe expands matter will be torn apart and result in the ripping of our universe. |
| The Big Crunch | The theory that states that gravity will over come the expansion of the universe and bring everything together in an implosion. |
| The Big Chill | The theory that explains as the universe expands the nuclear fuel will be exhausted leaving the earth without light or heat. |
| The Big Bang | What is thought to be the beginning of the universe, an explosion that sent our universe expanding exponentially today. |
| Edwin Hubble | The scientist who concluded that the universe's expansion is exponential. |