Across
- 4. 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.
- 5. an imaginary line about which a body rotates.
- 6. a fixed luminous point in the night sky which is a large
- 7. a small body of matter that enter's earth's atmosphere.
- 9. a celestial body moving in an elliptical orbit around a star.
- 13. the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of equal length (about September 22 and March 20)
- 14. a chart or series of pages showing the days, weeks, and months of a particular year, or giving particular seasonal information.
- 17. 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.
- 19. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
- 20. either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days.
- 21. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
- 22. an object placed for orbit around the earth or the moon.
- 23. a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.
- 26. the action of rotating around an axis or center.
- 27. eclipse an eclipse in which the moon appears darkened as it passes into the earth's shadow.
Down
- 1. a bowl-shaped depression, or hollowed-out area, produced by the impact of a meteorite, volcanic activity, or an explosion.
- 2. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution
- 3. dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions.
- 8. an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination.
- 10. a distinct period or stage in a series of events or a process of change or development.
- 11. every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers
- 12. the partially shaded outer region of the shadow cast by an opaque object.
- 15. a forcible overthrow of a government or social order, in favor of a new system.
- 16. a celestial object consisting of ice and dust.
- 18. eclipse an eclipse in which the sun is obscured by the moon.
- 24. tide a tide just after a new or full moon, when there is the greatest difference between high and low water.
- 25. tide a tide just after the first or third quarters of the moon when there is least difference between high and low water.
- 27. of universal