Across
- 3. The point at which the moon is closest to earth
- 4. eclipse An eclipse of the moon,moon passes through earth's shadow
- 5. The point in the orbit of a planet where it is closest to the sun
- 6. motion The apparent westward motion of the planets with respect to the stars
- 7. The place in the orbit of a planet where it is furthest away from the sun
- 10. The study of the universe
- 12. The path an object makes as it goes around another object in space
- 14. The point where the moon is furthest from the earth
- 17. The motion of one body about another
Down
- 1. Earth centered universe
- 2. An oval path
- 5. A slow motion of earths axis that traces out a cone over a period of 26000 years
- 7. unit Average distance from the earth to the sun
- 8. Sun centered universe
- 9. Any of a system of bright elongated streaks,sometimes associated with a crater on the moon
- 11. Smooth areas on the moon
- 13. The depression at the summit of a volcano caused by a meteorite impact
- 15. The spinning of a body about its axis
- 16. eclipse An eclipse of the sun,the sun passes through earths shadow