History of Astronomy Crossword Puzzle

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Across
  1. 1. This astronomer discovered four of Jupiter's moons among other phenomena using a telescope
  2. 4. This ancient astronomer was a large believer of the geocentric model
  3. 5. This astronomer collected data of positions of planets and was able to accurately predict positions without a telescope
  4. 8. This astronomer developed the three laws of motion while also inventing calculus
  5. 11. The model that shows the Sun as the center of the universe
  6. 12. Around 750 BC, Mayans tracked the skies and recorded this information in these tables
  7. 14. Newton's Laws of _____________ describe how objects move- including a low about equal and opposite reactions
Down
  1. 2. This astronomer of Greece calculated the size of Earth with good accuracy around 200 BC
  2. 3. Newton discovered the Universal Law of _____________
  3. 6. Copernicus' model was not completely accurate as he placed the planets in perfect circular orbits. However, we know that the orbits of planets is actually ______________.
  4. 7. This astronomer developed a model that showed planets orbit the sun in perfect circles
  5. 9. This astronomer worked with Brahe and determined the elliptical motion of planets
  6. 10. The Earth is the center of the universe is a hallmark of this model
  7. 13. One piece of evidence supporting the Heliocentric model was the observation of these orbiting Jupiter