| A | B |
|---|
| Binary Stars | two stars revolve around each other |
| Multiple Star System | three or more stars (Alpha Centauri) |
| Constellations | group of stars that form a pattern |
| Elliptical Galaxy | shaped nearly spherical to flat |
| Galaxy | huge collection of stars |
| Nebula | massive cloud of dust & gas between the stars |
| Nova | star that suddenly increases in brightness in just a few days or hours |
| Spectrum | band of colors formed when light passes through a prism |
| Spiral Galaxy | shaped like pinwheels (Milky Way) |
| Irregular Galaxy | no definite shape (Magellanic Clouds) |
