| A | B |
|---|
| space probes | spacecraft, packed with instruments that collect data |
| solar system | sun and its planets and satellites |
| satellite | a body in space that revolves around another body in space |
| new moon | unable to see moon from earth |
| full moon | totally lit moon surface |
| solar eclipse | moon's shadow falls on the earth |
| lunar eclipse | earth's shadow falls on the moon |
| 1 astronomical unit | 149.6 million kilometers |
| Venus | covered with thick clouds of carbon dioxide |
| Mars | surface is iron oxide |
| gas giants | Jupiter Saturn, Uranus, Neptune |
| comet | arge chunk of frozen gases and ice |
| asteroid | small rocky bodies that orbit the sun |
| meteroids | solid, rocklike objects from space |
| Winslow, Arizona | meteor crater |
