Gravity and the Solar System

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Across
  1. 2. when one objects goes around another object
  2. 4. celestial object that orbits a star (Sun)
  3. 6. the collection of stars and planets that surrounds the sun which is in the center
  4. 7. the path that the planet takes around the sun
  5. 8. the amount of matter in a space
  6. 9. celestial object that orbits planets
  7. 10. the name of our Galaxy
Down
  1. 1. amount of space between two objects
  2. 3. flattened circle that's oval shaped
  3. 5. the universal force of attraction between all matter