Earth's Moon

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Across
  1. 2. the time it takes for one rotation to occur
  2. 3. less than a full circle
  3. 5. the quarter moon that is waxing
  4. 7. an object that orbits another object
  5. 8. the phase where the moon is a sliver of light
  6. 9. one object moving around another object
  7. 12. the phase that occurs when the near side is fully lit
  8. 15. the source of the moon's light
  9. 17. how the moon appears to observers on Earth
  10. 18. the amount of moonlight seen from Earth is decreasing
  11. 19. a natural satellite
Down
  1. 1. the force that pulls the moon towards Earth
  2. 4. the darkest part of a shadow
  3. 6. spinning on an axis
  4. 10. one object in space casts a shadow on another object
  5. 11. the number of moons that orbit Earth
  6. 13. the amount of moonlight seen from Earth is increasing
  7. 14. the number of Earth days for one rotation of the moon
  8. 16. the phase when the near side of the moon is dark