Across
- 4. large ball of ice and dust that orbits the sun
- 7. four planets farthest from the sun
- 10. center of the solar system
- 11. Small rocky objects that burn up in Earth’s atmosphere, often called “shooting stars”
- 13. the path the object takes as it moves around another object in space
- 14. the galaxy in which we live
- 16. four planets closest to the sun
- 18. the force of one object's pull on another
Down
- 1. the sun and the objects that orbit around it
- 2. closest planet to Earth
- 3. big, blue-green planet
- 5. a large body of rock or gas that orbits around a star
- 6. chunk of rock or metal that orbits the sun
- 8. smallest planet, closest to the sun
- 9. largest planet
- 12. planet with rings made of rocks and gas
- 15. the perfect planet for life
- 17. hot ball of glowing gases