Exploring the Universe

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