| A | B |
|---|
| The natural satellite of Neptune | Triton |
| A thick atmosphere of nitrogen | Titan |
| These natural satellites are called the Galilean Moons | Io, Callisto, Europa, and Ganymede |
| The natural satellite with active volcanoes erupting sulfur materials | Io |
| The largest natural satellite | Gaynamede |
| The natural satellite thought to have an ocean beneath its surface of ice | Europa |
| The natural satellite that has volcanoes erupting liquid nitrogen | Triton |
| The natural satellite of Saturn | Titan |
| We landed a probe on the suface of this natural satellite | Titan |
| The natural satellites of Jupiter | Io, Callisto, Europa, and Gaynamede |
| This natural satellite revolves retrograde around its planet | Triton |
| This natural satellite is considered the most cratered object in the solar system | Callisto |
| These natural satellites belong to Mars | Phobos and Deimos |
| This natural satellite is the largest compared to the planet it revolves around | Charon |
| This natural satellite appears to have a smooth surface with what appear to be cracks in the icy surface | Europa |
| This natural satellite has lakes and rivers of methane on its surface | Titan |
| These natural satellites are believed to be captured asteroids | Phobos and Deimos |
| Meteorite | A chunk of space rock that hits the Earth |
| Meteor | The bright streak of light seen in the sky from a piece of rock burning up through Earth's atmosphere |
| Comet | A chunk of ice and rock |
| Asteroid | A chunk of rock believed to be left over from the formation of the solar system |
| Meteoroid | A small piece of rock orbiting in space |
| Coma | The gas that surrounds the nucleus of a comet when it approaches the Sun |
| Oort Cloud | A spherical region that surrounds the solar system and is believed to be the source of long term comets |
| Valhalla | A large impact crater in the ice of Callisto |
| Formed when the solar wind blows away the coma of a comet | A comet's tail |
