Earth's Movements

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Across
  1. 3. the action of rotating around an axis or center.
  2. 5. the period of darkness in each twenty-four hours; the time from sunset to sunrise.
  3. 6. the planet on which we live; the world.
  4. 8. the star around which the earth orbits
  5. 10. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
  6. 11. the part of a day when it is light; the time between sunrise and sunset
  7. 12. the time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20).
  8. 13. a half of the earth, usually as divided into northern and southern halves by the equator
Down
  1. 1. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.
  2. 2. the time or date (twice each year) at which the sun reaches its maximum or minimum declination, marked by the longest and shortest days (about June 21 and December 22).
  3. 4. a form of electromagnetic radiation
  4. 7. an imaginary line about which a body rotates
  5. 9. the movement of an object in a circular or elliptical course around another or about an axis or center.