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Across 8. making night and day of approximately equal length all over the earth and occurring about september22 13. the solstice on or about June 21st that marks the beginning of summer in the Northern Hemisphere. 15. an a body, surface, or device that reflects light, heat, sound, or the like 17. lowest tide near the first and third quarter moons 20. to get smaller periodiclly 22. an eclipse of the moon 23. first or last quarter, resembling a segment of a ring

Down 1. making night and day of approximately equal length all over the earth and occurring about March 21 2. the force of attraction by which terrestrial bodies tend to fall toward the center of the earth. 3. periodic change in the elevation of the oceans tide 4. the solstice on or about December 21st that marks the beginning of winter in the Northern Hemisphere. 5. high tide closet to new and full moons 6. object or material that refracts 7. to increase in size periodiclly 9. looks like a crescent 10. whole moon is illumenated 11. the dark central portion of a sunspot 12. pertaining to or produced by both reflection and refraction. 14. half is light 16. satellite close to the earth 17. invisible 18. the grayish marginal portion of a sunspot 19. satellite far away from earth 21. more than half full