Across
- 6. landed Neil Armstrong and Edwin Aldrin on the moon
- 7. made of silicon and oxygen
- 8. distance between peaks on a wave
- 10. distance light travels in a year
- 12. number of waves per second
- 14. first American on the moon
- 16. when the sun is directly over the equator
- 17. direction the sun rises
Down
- 1. first human in space
- 2. valleylike structures on the moon
- 3. closest point in moon's orbit to Earth
- 4. the time from one noon to the next
- 5. heavy cratered regions of the moon
- 9. dark smooth plains of elevation on the moon
- 11. 12% of sunlight
- 13. direction the sun sets
- 15. farthest point in moon's orbit to Earth