Earth's Moon

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Across
  1. 1. one object in space casts a shadow on another object
  2. 6. less than a full circle
  3. 8. an object that orbits another object
  4. 9. the amount of moonlight seen from Earth is increasing
  5. 10. the source of the moon's light
  6. 11. the side of the moon never seen from Earth
  7. 14. the number of moons that orbit Earth
  8. 15. the phase where the moon is a sliver of light
  9. 16. the amount of moonlight seen from Earth is decreasing
  10. 18. one object moving around another object
  11. 19. a natural satellite
  12. 20. the quarter moon that is waning
Down
  1. 2. how the moon appears to observers on Earth
  2. 3. the number of Earth days for one rotation of the moon
  3. 4. the phase that occurs when the near side is fully lit
  4. 5. the phase right after a new moon
  5. 7. the darkest part of a shadow
  6. 12. spinning on an axis
  7. 13. the phase when the near side of the moon is dark
  8. 17. the force that pulls the moon towards Earth