Solar System Extra Credit

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Across
  1. 4. shape of an ellipse, determined by focal length divided by major axis
  2. 8. shape of an orbit
  3. 9. _______ space station
  4. 13. model of the solar system with the Sun at the center
  5. 15. planets made up of rock
  6. 17. widest point of an ellipse
  7. 18. robots that take samples from other planets
  8. 24. ______ moon, phase where the moon is completely shadowed
  9. 28. asteroid sized pre-planets
  10. 29. object spinning around central point
  11. 30. _______ disk formation
Down
  1. 1. model of the solar system with Earth at the center
  2. 2. objects far apart from one another _________ the gravitational pull
  3. 3. high mass ________ the gravitational pull
  4. 5. combined gravitational pull of sun and moon cause a ______ _____ on Earth
  5. 6. moon becomes darker, after full moon
  6. 7. object orbiting around another object
  7. 10. gas giants, outer planets
  8. 11. Phase of the moon during a lunar eclipse
  9. 12. planet with the lease gravitational pull from Sun due to distance
  10. 14. partial or complete obscuring of light
  11. 16. dark lowlands of the moon
  12. 19. an object that orbits a bigger object
  13. 20. Physical barrier between inner and outer planets, made of asteroids
  14. 21. planet not in our solar system
  15. 22. planet with the shortest rotation
  16. 23. force that pulls objects towards its center
  17. 25. elevated planes of the moon
  18. 26. _______ theory, theory for the formation of the solar system
  19. 27. new moon crosses between the sun and Earth