Kepler's Laws- discovery crossword

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Across
  1. 3. Kepler's 2nd is the law of ____ ___ (2 words)
  2. 4. The measure of how much of an oval an object is.
  3. 7. Half of the major axis
  4. 9. The major axis is a line that goes across the (narrowest/widest) part of an oval
  5. 11. The place in an orbit when the satellite is Farthest from what it orbits.
  6. 13. The place in an orbit when the satellite is Closest to what it orbits.
  7. 15. The Earth orbits this large object.
  8. 16. Another term for when a satellite orbits around another object (verb form of the word)
  9. 17. The minor axis is a line that goes across the (narrowest/widest) part of an oval
  10. 19. In the middle of the circle, there is one of them.
Down
  1. 1. The orbital period ________ equals the semi-major axis ______.(This is a formula)
  2. 2. Kepler's 3rd law is the law of ______ (not periods)
  3. 5. This force causes Earth to speed up and slow down as it orbits.(2 words)
  4. 6. In the equation in Kepler's 3rd law, this letter represents the orbital period and this letter represents the semi-major axis.
  5. 8. Kepler's 1st law describes this aspect of orbits
  6. 10. Kepler's 1st law is the law of _______
  7. 12. The area covered when a celestial body orbits an object
  8. 14. In general, Kepler's laws are laws of planetary ______.
  9. 18. Two things in an oval