Unit 1 Space Exploration

123456789101112131415
Across
  1. 3. all observed matter, energy, and time
  2. 5. The stronger the gravity, the more spacetime curves, and the slower time itself proceeds
  3. 6. point on an orbital path farthest from the Sun
  4. 11. The model had the universe as a set of nested spheres surrounding the Earth
  5. 14. model where the Sun is the center of our solar system
Down
  1. 1. a unit of length, roughly the distance from Earth to the Sun
  2. 2. point on an orbital path nearest the Sun
  3. 4. a unit of astronomical distance equivalent to the distance that light travels in one year
  4. 7. who created the geocentric model of the universe?
  5. 8. who started the revolution against the geocentric model of the universe?
  6. 9. only confirmed location of life
  7. 10. the ratio of the distance between the foci and the length of the major axis
  8. 12. who's key discovery was that planetary orbits are not circles but instead are a special type of oval called an ellipse?
  9. 13. dimension that measures the passing of time
  10. 15. who explained the distance of stars but was never able to come up with an explanation for planetary motion?