Across
- 1. a mass of gas in space that gives off energy
- 4. a layer of gases that surrounds most planets.
- 5. a large, rocky object that orbit planets
- 7. a large body of rock or gas that orbits the sun.
- 8. include Mercury, Venus, Earth, and Mars.
- 10. to spin.
Down
- 2. the imaginary line around which a planet rotates.
- 3. include Jupiter, Saturn, Uranus, and Neptune.
- 6. to move around another object, along a path.
- 9. to move around an object in a circular motion.