Early Astronomers

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Across
  1. 3. Observed a supernova - named after him. Created the 3 laws of Planetary motion
  2. 5. Library of Alexandria, Earth’s circumference and tilt
  3. 6. 400BC zodiacs, basis of where Greek’s started with astrology
  4. 7. astronomers developed the astrolabe, a tool for measuring the position of stars and planets
  5. 10. Geocentric support. Celestial sphere that each planet stays within.
  6. 11. observed and recorded Halley's Comet 240BC
  7. 12. created usable telescope, studies supported heliocentric ideas, sunspot tracking
Down
  1. 1. Heliocentric Theory: He placed the Sun at a fixed point near the center of the universe, with Earth and other planets revolving around it in circular orbits
  2. 2. Universal Law of Gravitation, used with planetary motion & orbits
  3. 4. published a star catalogue in 140 CE that endorsed the geocentric model
  4. 8. Created first almanacs and predicted movements of the sun, planets, and moon
  5. 9. Recorded a supernova, 1st ‘state’ funded observatory (with TONS of observations)