Earth's Moon

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