الفلك

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Across
  1. 2. A stone site in south of England,the sun rose directly over the heel stone on the longest day of the year
  2. 6. simplified geometry of the orbits of earth and venus as they move around the sun
  3. 7. realization that earth is not the center of the universe.
  4. 11. the force that holds objects down
  5. 12. A backwards loop that a planet will take during orbit
  6. 13. famous for the law of gravity
  7. 15. suns inward pull of gravity on a planet that stops it from moving straight
Down
  1. 1. provide a more natural explanation of the tangled geocentric cosmology
  2. 3. slight shift in the observed direction to a star, caused earths mtion
  3. 4. an object that keeps moving at the same pace unless acted upon a force
  4. 5. Greek philosopher that taught about the solar system
  5. 8. transit of mercury across the face of the sun, only happens once per decade
  6. 9. amount of time a planet takes to circle the sun
  7. 10. a push or pull that changes an objects direction of motion
  8. 14. flattened circle