Across
- 2. related to the moon
- 4. happening once a day
- 7. the North Star
- 9. bounces off
- 11. related to the sun
- 14. pass across
- 15. the angle of an object above the horizon
Down
- 1. happening once a year
- 3. all of space, all of matter and all the energy in it
- 5. a large collection of stars held together by gravity
- 6. the motion of the Earth around the Sun
- 7. something that happens over and over
- 8. go through
- 10. when the position of an object blocks the other
- 11. when light reflects off matter in all directions
- 12. attractive force
- 13. sticking together of matter due to gravity