Astronomy

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Across
  1. 2. eclipse an eclipse in which the moon appears darkened as it passes into the earth's shadow.
  2. 4. tide a tide just after the first or third quarters of the moon when there is least difference between high and low water.
  3. 10. a chart or series of pages showing the days, weeks, and months of a particular year, or giving particular seasonal information.
  4. 11. a distinct period or stage in a series of events or a process of change or development.
  5. 12. 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.
  6. 15. an object placed for orbit around the earth or the moon.
  7. 17. a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.
  8. 18. of universal
  9. 19. dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions.
  10. 21. the action of rotating around an axis or center.
  11. 23. the partially shaded outer region of the shadow cast by an opaque object.
  12. 26. 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.
  13. 27. a celestial object consisting of ice and dust.
Down
  1. 1. a fixed luminous point in the night sky which is a large
  2. 3. 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.
  3. 5. a celestial body moving in an elliptical orbit around a star.
  4. 6. 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.
  5. 7. a forcible overthrow of a government or social order, in favor of a new system.
  6. 8. 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
  7. 9. tide a tide just after a new or full moon, when there is the greatest difference between high and low water.
  8. 13. 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.
  9. 14. 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)
  10. 15. eclipse an eclipse in which the sun is obscured by the moon.
  11. 16. a bowl-shaped depression, or hollowed-out area, produced by the impact of a meteorite, volcanic activity, or an explosion.
  12. 20. an imaginary line about which a body rotates.
  13. 22. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
  14. 24. a small body of matter that enter's earth's atmosphere.
  15. 25. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution