Astronomy

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Across
  1. 3. An oval shape
  2. 5. Used math to prove Heliocentrism
  3. 6. Polish astronomer whose book was banned for 200 years
  4. 9. Our home galaxy
  5. 11. Greek philosopher who believed in Geocentrism
  6. 12. Copernicus' profession, apart from astronomy
  7. 13. One of Galileo's inventions
Down
  1. 1. The idea that the Earth is at the center of the solar system
  2. 2. Greek astronomer who supported Heliocentrism
  3. 4. Takes approx. 243 earth days for one rotation
  4. 7. This was once a planet in our solar system
  5. 8. A person who studies the world through observation, investigation and experimentation
  6. 10. The study of the stars