| Term | Definition |
| Nebula | A cloud of gas and dust. |
| Protostar | A disk shape object, ( a stars beggining) |
| Nuclear Fusion | When nuclei combine to make bigger nuclei. |
| Nuclei Fission | When a big atom is broken down into many other nuclei. |
| Red Giant | Its when a star collapses and the temperature and size increases so then that makes it look big and red. |
| Red Super Giant | Its when a big star turns into a red giant. |
| Planetary Nebula | Outer gases drift away and then all you are left wiht is this. |
| Supernova | When the star contracts with a grat ammount of force and then releases with great force just leaving a big clump of elements. |
| White dwarf | This is after the supernova and its just a big white ball. |
| Black Dwarf | The final part of the star. Its when the star has no life and it still does not exist yet. |
| Black Hole | One of the options a big star has when it goes though supernova. |
| Neutron Star | A Ball contracted in by the supernova that now its just a big dence ball of neutrons. |