Across
- 5. Small rocky or metallic body
- 9. Collection of celestial bodies within a galaxy
- 11. Inner four planets
- 13. Attractive force between everything with mass
- 15. approximately 93 million miles
- 16. Celestial body that orbits the sun
Down
- 1. Path a celestial body takes around another object
- 2. Model with the sun as the center
- 3. Small body made of ice, dust, and gas
- 4. Model with the earth as the center
- 6. Meteoroid that has burned up in earth's atmosphere
- 7. Natural satellite that orbits a planet
- 8. Huge collection of stars, gas, and dust
- 10. Any celestial body that orbits another body
- 12. Star at the center of our solar system
- 14. Separates first four planets from the last four