Across
- 2. the force that attracts a body toward the center of the earth.
- 5. the phase of the moon in which its whole disk is illuminated.
- 6. something that refracts light
- 7. a tide just after a new or full moon, when there is the greatest difference between high and low water.
- 8. the moon phase after waxing crescent.
- 11. something that reflects light
- 13. the equinox in spring, on about March 20 in the northern hemisphere and September 22 in the southern hemisphere.
- 16. the equinox in autumn, on about September 22 in the northern hemisphere and March 20 in the southern hemisphere.
- 17. the solstice that marks the first of winter, at the time of the shortest day.
- 20. the moon phase before waning crescent.
- 23. the curved sickle shape of the waxing or waning moon.
Down
- 1. the shadow cast by the earth or moon over an area experiencing a partial eclipse.
- 2. the moon) having the observable illuminated part greater than a semicircle and less than a circle.
- 3. an eclipse in which the sun is obscured by the moon.
- 4. an eclipse in which the moon appears darkened as it passes into the earth's shadow.
- 7. the solstice that marks the first day of summer, at the time of the longest day.
- 9. the fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse.
- 10. the alternate rising and falling of the sea, usually twice in each lunar day at a particular place, due to the attraction of the moon and sun
- 12. (of the moon) have a progressively smaller part of its visible surface.
- 14. (of the moon) have progressively bigger part visible on its surface.
- 15. the phase of the moon when it is in conjunction with the sun and invisible from earth
- 18. a tide just after the first or third quarters of the moon when there is the least difference between high and low water.
- 19. denoting an optical system that involves both the reflecting and refracting of light, in order to reduce aberration.
- 21. the point in the orbit of the moon or a satellite at which it is nearest to the earth.
- 22. the point in the orbit of the moon or a satellite at which it is furthest from the earth.