Reasons For the Seasons

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Across
  1. 3. A line between both poles
  2. 5. The action of moving around something
  3. 10. A closed plane curve
  4. 11. The angular distance of a place
  5. 15. The polestar or North star
  6. 17. Not directly pointed at something
  7. 19. A misunderstanding of something
  8. 20. The twelve named periods
Down
  1. 1. The time or date
  2. 2. An imaginary line
  3. 4. The curved path of an object
  4. 6. The degree or intensity of heat
  5. 7. A space living things live on
  6. 8. the time or date
  7. 9. The period of 365 days
  8. 12. The rotation of something
  9. 13. A period of 24 hours
  10. 14. Each four divisions of the year
  11. 16. Directly pointed at something
  12. 18. The period of darkness