| A | B |
|---|
| Mercury | planet nearest the Sun |
| Sun | center of our solar system |
| Venus | Sister" planet to the Earth |
| Earth | the largest of the inner planets. |
| Mars | bright appearance and reddish color |
| Jupiter | largest planet in the solar system. |
| Saturn | most spectacular set of rings |
| Uranus | 20 known moons |
| Neptune | bluish color comes from its atmosphere of methane gas |
| Pluto | the only planet that has not been visited by a spacecraft from Earth |
| Asteroids | rocky objects with round or irregular shapes |
| Comets | lumps of ice and rock |
