Across
- 2. A fiery ball of hot gas
- 4. Number of Planets in the Solar System
- 7. Earth has ___ moon
- 8. Planet closest to the sun
- 9. Force that keeps the planets orbiting the sun
- 11. The biggest planet
- 13. Mercury's nights are very ____
- 14. Planet that has clearly visible rings encircling it
- 15. Known as the Red Planet
Down
- 1. Mercury's days are very ___
- 3. Planet furthest away from the sun
- 5. How long it takes for the Earth to orbit the sun
- 6. Compared to other planets Earth is very
- 10. The sun is not a planet it is a ____
- 12. Like Earth Mars has sheets of ice at the top and bottom of the planet named _____. Hint: Earth has North and South _____