Geocentric and Heliocentric Crossword

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Across
  1. 3. tried to combine the geocentric and heliocentric theories
  2. 5. one of the people who developed the Geocentric theory
  3. 8. small circles that planets move in
  4. 10. described the law of gravity
  5. 11. one of the people who developed the Geocentric theory
  6. 12. calculated that the shape of the orbits was an ellipse
Down
  1. 1. theory theory that the earth is at the center of the solar system
  2. 2. invented the telescope
  3. 4. theory theory that the sun is at the center of the solar system
  4. 6. a planet's sphere
  5. 7. described epicycles
  6. 9. created the Heliocentric theory