| A | B |
|---|
| Solar System | A group of objects in space that move around a central star |
| Star | A burning sphere of gases |
| Planet | A large object that moves around the sun |
| Asteroids | Small and rocky |
| Comet | A small mass of dust and ice that orbits the sun in a long oval-shaped path |
| Axis | The imaginary line which runs through both poles of a planet |
| Orbit | The path an object makes as it revolves around the sun |
| Inner Planets | Mercury, Venus, Earth, Mars |
| Outer Planets | Jupiter, Saturn, Uranus, Neptune, Pluto |
| Gas Giants | Jupiter, Saturn, Neptune, Uranus |
| Telescope | A device people use to observe distant objects |
| Space Probes | Vehicles that carry cameras, instruments, and other tools |
| Constellation | Pattern or group of stars |
