Astronomy Crossword - Module 4

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Across
  1. 4. He used mathematics to justify the heliocentric universe
  2. 5. Aristarchus of Samos used his observations to develop this Sun centered model
  3. 7. He was the first to observed the planet Neptune
  4. 9. This text mathematically justified the view of the Greek geocentric universe
  5. 11. A large asteroid that has now been labeled a dwarf planet
  6. 12. He published a list of 103 astronomical objects not to be mistaken for comets
  7. 14. He showed the Moon circled the Earth and did not travel in a straight line due to gravity
  8. 16. (2W)Here millions of asteroids are spread out over a large area
  9. 17. He discovered Jupiter had its own moons and was not just a single, lone planet
  10. 19. He was the first to use mathematics as a foundation for the Geocentric model
  11. 20. He discovered the dwarf planet Pluto
Down
  1. 1. This universe model satisfied the human ego with the Earth at the center of everything
  2. 2. (2W)This region beyond Neptune contains icy bodies, comets, and Pluto
  3. 3. (2W)Jan Oort proposed this region of trillions of icy bodies in a thick bubble of icy debris
  4. 6. They discovered the planet Uranus
  5. 8. Document published by Aryabhata the Elder supporting a heliocentric universe model
  6. 10. This motion pattern caused Ptolemy to assume planetary orbits were not circular
  7. 13. He developed the basis for the geocentric universe model
  8. 15. Challenging the geocentric model could result in a charge of this
  9. 18. (2W) His discovery of a new bright start challenged the unchanging nature of the "sphere of stars"