Across
- 2. The only planet that supports life
- 4. The planet that is too small to be a planet.
- 7. Everything that exists - planets, stars, dust, gases, and energy.
- 9. A rock that orbits a planet
- 10. the distant light travels in an earth year.
Down
- 1. The hottest planet
- 3. the planets are mostly made of gas
- 5. The path an object in space takes as it revolves around another body.
- 6. The planets that are mostly made up of rock
- 8. a ball of gas held together gravity