Across
- 4. Closest planet to the sun
- 5. Hottest planet in the Solar system
- 6. Planets that are closer to the sun
- 7. Also known as the red planet
- 8. Only planet that is known to have life
Down
- 1. A mixture of gases that surrounds planets
- 2. Similar in some ways
- 3. Moved repeatedly around
- 7. A celestial object that orbits planets