Across
- 4. a celestial object that orbits a planet
- 6. having to do with land
- 8. the only planet that can sustain human life
- 9. the gases that surround a planet
- 10. to move repeatedly around
Down
- 1. the planets farther away from the sun
- 2. these are the planets closest to the sun
- 3. the furthest planet from the sun
- 5. the second planet in the solar system
- 7. the closest planet to the sun