Across
- 2. developed the Heliocentric model
- 7. darkest part of a shadow
- 8. solid rocky or metallic body that orbits the sun
- 10. pieces of water and methane mixed with rocky or metallic solids
- 11. earths orbit
Down
- 1. lighter part of a shadow
- 3. the spinning of earth on its axis
- 4. stars and planets that cluster
- 5. small piece of a comet or astroid
- 6. atoms that cluster together
- 7. everything that exists
- 9. any object that revolves around another object
- 12. a mass of hydrogen and helium