| A | B |
|---|
| Nebula | a spinning cloud of gas and dust |
| Protostar | a new star |
| Nuclear Fusion | energy process on a star |
| Red Giant | expanded star |
| Supernova | Explosion of a large or very large star |
| Neutron star | remains of a large star after a supernova |
| Black hole | remains of a very large star after a supernova |
| Pulsar | neutron star emitting pulsating radio waves |
| Quasar | most distant objects in universe |
| White Dwarf | remains of dying small star |
