Across
- 3. planets planets closest to the sun
- 7. gasses that surround a planets
- 9. planets the 4 planets farthest from the sun
- 10. known as the red planet
Down
- 1. moves around repeatedly
- 2. planets that are like the earth
- 4. planet that contains water and oxygen
- 5. earths sister planet
- 6. planet that has the shortest orbit around the sun
- 8. celestial objects that orbits a planet