Ancient to Greeks Review

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Across
  1. 2. Greek who cataloged stars based on their brightness.
  2. 3. First astronomer to observe Ganymede, describing it as a reddish star.
  3. 4. Constellation associated with the Pyramids of Giza.
  4. 5. The apparent backward motion of planets in the sky.
  5. 11. Greek astronomer who first proposed the heliocentric model.
  6. 12. Small circles used by Ptolemy to explain the motion of planets.
  7. 13. Monument whose corners align with seasonal changes.
  8. 14. Planet followed by the ancient site El Caraco in Mexico.
  9. 16. Greek astronomer who introduced epicycles to explain retrograde motion.
  10. 17. Moon of Jupiter first observed by Chinese astronomer Gan De.
  11. 18. The Pyramids of Giza align with the changing of these seasons.
  12. 19. Greek who calculated the Earth's circumference using shadow angles.
Down
  1. 1. A model with Earth at the center of the solar system.
  2. 2. A model with the Sun at the center of the universe.
  3. 6. Recognized by Democritus as a collection of stars, not a mysterious object.
  4. 7. First civilization to keep detailed records of celestial objects.
  5. 8. Greek philosopher who claimed the Earth was stationary.
  6. 9. English monument aligned with the summer solstice sunrise.
  7. 10. Chinese star atlas considered the earliest known preserved star map.
  8. 15. Planet linked to Horus in ancient Egyptian culture.