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