Across
- 4. When a planet travels one full path around the Sun.
- 6. The spinning of a planet on its axis.
- 7. A huge, glowing ball of gas that gives off light and heat.
Down
- 1. A natural object that goes around a planet.
- 2. All the planets, moons, and other objects that go around our star together.
- 3. A large object that moves around a star, like Earth.
- 5. The path an object takes as it travels around something else.
- 7. Everything outside Earth’s atmosphere.