ES 10.1 Review

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Across
  1. 2. a space that does not contain any matter
  2. 4. Earth’s most distant point
  3. 7. amount of time a planet takes to complete its orbit
  4. 8. sun centered
  5. 9. symmetrical oval
  6. 10. closest point to the sun
  7. 11. circle around due to gravity
  8. 13. this astronomer proposed the heliocentric theory
  9. 14. developed the law of gravity
  10. 15. our galaxy
Down
  1. 1. this astronomer agreed with Copernicus
  2. 3. the force of gravity depends on___________and distance
  3. 4. popularized the geocentric theory
  4. 5. Kepler developed__________laws of planetary motion
  5. 6. earth centered
  6. 10. this astronomer assumed that the planets traveled in small circles called epicycles
  7. 12. the study of God’s creation beyond our atmosphere