Spooce Life

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Across
  1. 2. also called Tycho he studied astrology, alchemy, and medicine
  2. 4. drawn using string,pencil and two thumbtacks
  3. 7. total amount of matter
  4. 9. force of gravity
  5. 12. semimajor axis of earth's orbit around the sun
  6. 13. discovered the law of gravity
  7. 14. earth ray at center of universe
Down
  1. 1. earth is not the center of the universe
  2. 3. two bodies with equal masses under the influence of their mutual gravity
  3. 5. sun's inward pull of gravity on a planet
  4. 6. 4 moons of Jupiter
  5. 8. Italian philosopher created the telescope
  6. 10. considered a dwarf planet in our solar system
  7. 11. discovered the aberration of starlight
  8. 15. a tendency to do nothing or to remain unchanged