Across
- 2. appears as a circle
- 4. force between two objects
- 6. telescope which uses radio waves
- 7. appears like an eyelash
- 9. person who travels in space
- 10. blue planet with 8 moons
- 11. the closest four planets to our sun
- 13. spin
- 15. our sun and all that circles it
- 18. second planet from the sun
- 20. instrument which makes far away objects look closer
- 22. holes in the ground
- 23. people who study stars and other objects in space
- 24. second largest planet in our solar system
- 25. largest planet in our solar system
- 26. icy object orbiting the sun
- 28. time it takes Earth to travel around the sun one time
- 29. fourth planet from the sun
Down
- 1. smallest planet (recently demoted)
- 3. shooting stars
- 5. natural object circling another in space
- 8. meteoroid that hits Earth
- 12. air around a planet
- 14. blue-green planet with rings and 18 moons
- 16. object sent into space to explore
- 17. broken pieces of asteroids or comets
- 19. travel in a circle around an object
- 21. third planet from the sun
- 27. planet closest to the sun