Astronomy- Anderson 1

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Across
  1. 4. the partial or total blocking of one object in space by another
  2. 6. the darkest part of a shadow
  3. 9. a system of organizing time that defines the beginning, length, and divisions of a year
  4. 11. the attractive force between objects; the force that moves objects downhill
  5. 12. either of the two days of the year on which the sun reaches its greatest distance north or south of the equator
  6. 15. either of the two days of the year on which neither hemisphere is tilted toward or away from the sun
  7. 16. eclipse the blocking of sunlight to the moon that occurs when earth is directly between the sun and the moon
  8. 17. dark, flat areas on the moon's surface formed from huge ancient lava flows
  9. 18. the movement of an object around another object
Down
  1. 1. the part of a shadow surrounding the darkest part
  2. 2. tide the tide with the greatest difference between consecutive low and high tides
  3. 3. tide the tide with the least difference between consecutive low and high tides
  4. 5. one of the different apparent shapes of the moon as seen from earth
  5. 7. the path of an object as it revolves around another object in space
  6. 8. the scientific law that states that states that every object in the universe attracts every other object
  7. 10. a chunk of rock or dust in space, generally smaller than an asteroid
  8. 12. eclipse the blocking of sunlight to earth that occurs when the moon is directly between the sun and earth
  9. 13. the periodic rise and fall of the level of water in the ocean
  10. 14. a large round pit caused by the impact of a meteoroid
  11. 16. of universal