Astronomy Topic 5 Part 1

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Across
  1. 4. September 23rd
  2. 6. it takes 26,000 years for one full cycle
  3. 7. Term given to the angle of a planet away from the ecliptic
  4. 8. It has the largest orbital inclination of all the major planets
  5. 9. In ancient greek they were know as the wanderers
  6. 14. The apparent path of the Sun in the sky
  7. 15. The incorrect model of the Solar system with the Earth at the centre
  8. 17. There are 12 (actually 13) in the Zodiacal band
  9. 18. The actual constellation that the First Point of Aries is within
Down
  1. 1. It's not the First Point of Aries - its 6 months later
  2. 2. December 21st
  3. 3. Two days in the year that are exactly 12 hours long
  4. 5. The First Point of Aries, March 21st
  5. 10. June 21st
  6. 11. A 16 degree region of the sky that accomodates the paths of the ecliptic and planets
  7. 12. The apparent backwards motion of a planet as it moves through the sky
  8. 13. It is hard to observe retrograde motion in this planet because its too fast, small and close to the Sun
  9. 16. The planets migrate this direction in the sky