Early Astronomy By Clio Rodriguez

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Across
  1. 1. orbit in which object of orbit is at center and orbiting body does not change speed
  2. 5. Greek astronomer that created first model of universe that used epicycles and deferents
  3. 7. apparent change in position of object due to change in observational position
  4. 11. model of the universe in which Sun follows path called ecliptic going around Earth once in one year
  5. 12. Polish astronomer known for first Sun-centered model of universe
  6. 15. one complete revolution of celestial body or artificial satellite
  7. 16. small circle placed on larger deferent
  8. 20. two words; what planets were originally referred to as
  9. 23. theory about one's place in the universe
  10. 24. bad scientific practice which masquerades as science, but does not follow rules
  11. 28. two words; galaxy that contains our solar system
  12. 29. model which survives repeated testing
  13. 30. Galileo discovered this planet was not a sphere
  14. 31. imaginary point directly "above"
  15. 32. how squashed ellipse is
  16. 33. model of the universe that had Earth at center and placed planets on epicycles, which were on deferents
  17. 36. cosmogony that proposes the Earth to be at the center of the universe
  18. 39. Greek philosopher who believed all natural motion is circular and reason is more important than observation
  19. 41. German astronomer who was a great mathematician and is known for first theoretical model to explain planetary motions
  20. 42. science that studies matter in outer space
  21. 44. people who lived in "four corners" who built structures to mark solstices and equinoxes
  22. 45. large circle that held smaller epicycle
Down
  1. 2. model of the universe that was created 1500 years after Ptolemy's model that placed Sun at center
  2. 3. famous structure in England that was used as observatory
  3. 4. north star
  4. 6. angular distance North or South of equator
  5. 8. what Galileo discovered on Moon's surface
  6. 9. backward motion
  7. 10. Greek astronomer who measured circumference of Earth with almost 100% accuracy
  8. 11. two words; first recorded attempt at rational explanation of heavens
  9. 13. cosmogony that proposes the Sun to be at the center of the universe
  10. 14. name of tribes of North America who created star maps and sighting circles for accurate time and religious/agricultural purposes
  11. 17. English astronomer known for first theoretical model to explain gravity
  12. 18. people who lived in Central America who accurately predicted eclipses
  13. 19. angular distance measured East or West
  14. 21. bad scientific practice which establishes "truths" through belief
  15. 22. oval-shaped orbit in which Sun is at focus and body has constantly-changing angular speed
  16. 24. time it takes for object to orbit
  17. 25. Galileo discovered this planet had phases
  18. 26. what Galileo discovered on Sun's surface
  19. 27. pseudoscience that claims to know how positions of planets influence human behavior
  20. 34. Greek philosopher who wrote The Physics and proposed fifth element
  21. 35. natural force of attraction which causes objects to fall back down to Earth's surface
  22. 37. name of imaginary sphere of infinite extent with Earth at center
  23. 38. Italian astronomer known for first observations of Sun
  24. 40. normal, forward motion
  25. 43. Danish astronomer known for best naked-eye observations