Astronomy Crossword Puzzle

1234567891011121314151617181920
Across
  1. 4. The movement of one object around another
  2. 5. The imaginary line that passes through Earth's center
  3. 7. When the Earth is directly between the moon and the sun
  4. 13. The very darkest part of the moon
  5. 14. The rise and fall of ocean water that occurs every 12.5 hours
  6. 15. A chunk of rock or dust from space
  7. 16. When an object comes between the sun and a third object
  8. 18. The study of the moon, stars, and other objects in space
  9. 19. A push or pull
  10. 20. The force of gravity on an object
Down
  1. 1. Attracts all objects toward each other
  2. 2. When the noon sun is directly overhead at the equator
  3. 3. When a new moon blocks your view of the sun
  4. 6. Causes the universe to fall apart faster and faster
  5. 8. When the sun is farthest north or south of the equator
  6. 9. Amount of matter in an object
  7. 10. A system of organizing time
  8. 11. The larger part of the moon's shadow
  9. 12. Circular path aroun an object
  10. 17. Tendency of an object to resist change in motion