heliocentric Tatum

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Across
  1. 2. Galileo invented a better, more powerful what?
  2. 5. what system did Copernicus?
  3. 7. what is the defi of sun?
  4. 8. what are one to the moons Galileo discovered orbiting Jupiter?
Down
  1. 1. What other planet goes through the same phases as the moon?
  2. 3. what astronomer created the first detailed heliocentric model of the solar system?
  3. 4. where was Kepler from?
  4. 6. how many principles are in Kepler's laws?