Earth,Sun,Moon

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Across
  1. 1. Concepts depending on whether you are talking about celestial bodies orbital mechanics.
  2. 4. orbits around the Earth.
  3. 6. A curved path the Earth and moon that goes around another do to gravity.
  4. 7. A source of illumination.
  5. 9. The action of rotating around a axis.
  6. 10. An imaginary line that the Earth revolves around.
  7. 11. Where we live and revolves around the Sun.
Down
  1. 2. At The center of the solar system.
  2. 3. A celestial body orbiting the earth or another planet.
  3. 4. Rocks that people take from the moon to test on earth.
  4. 5. This orbit's a large body in space.
  5. 8. Pulls matter toward the the Earth making every thing stay in place.