Historical Astronomy

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Across
  1. 2. the type of moon before and after a new moon
  2. 4. a planets path around the Sun
  3. 7. Earth's _____ creates the seasons
  4. 8. moon phase that follows a full moon
  5. 9. the universe is _________ and galaxies are moving further apart from each other
  6. 12. without this, our planet would fly off into space
  7. 14. spinning on axis; makes day and night
  8. 17. eclipse that occurs when the Earth creates a shadow on the moon
  9. 18. occurs when Earth is tilted towards the Sun
  10. 19. losing light
  11. 20. gaining light
  12. 21. eclipse that occurs when the moon is between the Earth & Sun
Down
  1. 1. model of the solar system with the earth in the center
  2. 3. a planet's trip around the Sun
  3. 5. theory that estimates the universe is about 14 billion years old
  4. 6. model of the solar system with the sun in the center
  5. 10. phase that occurs when the moon is closest to the Sun
  6. 11. the type of moon before and after a full moon
  7. 13. shape of the planets' orbit
  8. 15. without this, our moon would crash into earth
  9. 16. moon phase that follows a first quarter moon