| A | B |
| galaxy | A star system containing from millions to billions of stars. |
| Milky Way | This is the galaxy in which Earth is located. |
| Local Group | Our Milky Way galaxy is one of about 40 galaxies in this cluster. |
| Andromeda galaxy | The two largest galaxies in the Local Group are the Milky Way and this: |
| Sagittarius Dwarf galaxy, Large and the Small Magellanic Cloud | These are the three galaxies closest to ours in our Local Group. |
| spiral galaxies | A giant pinwheel shape with a central nucleus and curved arms. |
| barred spirals | Like a spiral galaxy except they have a bar running through the nucleus. |
| elliptical galaxy | These galaxies have the look of a egg, football, and some like a sphere. |
| irregular galaxies | Stars clumped together in no definite shape. |
| nebulae | Large clouds of gas and dust in space. |