Origin of Modern Astronomy Vocabulary Practice

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Across
  1. 3. When the moon is farthest from the earth.
  2. 5. When the moon is closest to the earth.
  3. 6. The science that studies the universe.
  4. 8. A change in the amount of moon that appears lit.
  5. 10. Elongated streaks that radiate outward for hundreds of kilometers and are still visible.
  6. 11. The motion of a body such as a planet or moon along its orbit around some point in space.
  7. 13. A model showing earth and the other planets orbiting the sun.
  8. 14. The turning or spinning of a body on its axis.
  9. 16. The most obvious features of the lunar surface.
  10. 17. The slight cone shaped movement of where earth's axis points.
  11. 18. Occurs during full moon phases.
  12. 19. Occurs during new moon phases.
Down
  1. 1. An oval shaped path.
  2. 2. This rather odd apparent motion actually results from the combination of the motion of earth and the planets own motion around the sun.
  3. 4. When earth is the farthest from the sun.
  4. 7. Earth was a sphere that stayed motionless at the center of the universe.
  5. 8. When earth is closest to the sun.
  6. 9. The path of an object as it goes around another object.
  7. 12. Features on the moon that look alot like river valleys.
  8. 15. The average distance between earth and the sun.