Crossword

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Across
  1. 3. A distinct period or stage in a series of events or a process of change or development
  2. 10. An object that orbits a star, and large enough to be rounded by its own gravity, and has cleared the area of it's orbit
  3. 11. A tide just after the first or third quarters of the moon when there is least difference between high and low water
  4. 14. A law stating that any two masses attract each other with a force equal to a constant
  5. 15. The fully shaded inner region of a shadow cast by an opaque object,
  6. 17. An eclipse in which the moon appears darkened as it passes into the earth's shadow.
  7. 19. An object that orbits the planet
  8. 20. Large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions
  9. 22. The spinning motion of planet on its axis
  10. 23. The force that attracts a body toward the center of the earth
  11. 24. A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
  12. 25. An imaginary line that passes through a planet's center adn its north and south pole, about which the planet rotates
  13. 26. The path of an object as it revolves around another object in space
Down
  1. 1. 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
  2. 2. A pattern or grouping of stars that people imagine to represent a figure or object
  3. 4. Either of the two days of the year on which the sun reaches iths greatest distance north or south of the equator
  4. 5. A hollowed-out area, produced by the impact of a meteorite, volcanic activity, or an explosion.
  5. 6. An eclipse in which the sun is obscured by the moon
  6. 7. Either of the two days of the year on which neither hemisphere
  7. 8. The partially shaded outer region of the shadow cast by an opaque object
  8. 9. A tide just after a new or full moon when there is the greatest difference between high and low water
  9. 12. A loose collection of ice and dust that orbits the sun, typically in a long, narrow orbit
  10. 13. A system of organizing time that defines the begining, length, and divisions of a year
  11. 16. A small body moving in the solar system that would become a meteor if it entered the earth's atmosphere
  12. 18. The moment of an object around another object
  13. 21. A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion