Earth, Sun, and Moon

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Across
  1. 2. any star around which a planetary system revolves
  2. 3. gibbous s between a half moon and full moon
  3. 4. a result of Earth's north pole being tilted its farthest away from the sun, and the sun's light aiming directly at southern latitudes
  4. 7. occurs when one object in space blocks an observer from seeing another object in space.
  5. 8. a moment in the year when the Sun's apparent path is farthest north or south from Earth's Equator
  6. 9. moon a moon phase when the moon appears completely illuminated when seen from Earth.
  7. 12. occurs when the position of the Sun is exactly over the Equator
  8. 13. an imaginary line an object turns around
  9. 15. the period between the spring equinox and the summer solstice
  10. 16. phase any of the varying appearances of the Moon as seen from Earth as different amounts of the lunar disk are illuminated by the Sun.
  11. 18. a period of the year that is distinguished by special climate conditions.
  12. 19. a half of the celestial sphere as divided into two halves by the horizon
Down
  1. 1. when something turns or spins around a point located at its center.
  2. 5. the object's orbital motion around another object.
  3. 6. a change in attitude of any portion of the earth's surface whether temporary
  4. 10. eclipse Earth moves between the sun and the moon, therefore blocking the sun's rays from striking the moon
  5. 11. moon the shape of the visible part of the moon when it is less than half full
  6. 14. marks when the Sun crosses over an imaginary extension of the Equator into outer space, travelling north to south
  7. 15. is a dark area on a bright surface.
  8. 17. new moon when half of the lit portion of the Moon is visible after the waxing crescent phase
  9. 18. the longest day of the year when the Earth's North Pole is tilted closest to the sun