Astronomy Topic 4, Part 1

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Across
  1. 5. day 24hrs. One full rotation with respect to the sun.
  2. 6. When the light part of the Moon is growing over the month
  3. 8. An imaginary line from North, South, Zenith and Nadir for an observer to measure against
  4. 9. The longest and shortest days
  5. 10. The phase where the moon cannot be seen
  6. 11. The plane/path the sun moves across in the sky
  7. 13. A natural zero for latitude
  8. 15. The internationally agreed zero for longitude
Down
  1. 1. The star has reached its highest point in the sky
  2. 2. A graph of RA versus declination for the Sun. A figure of 8 shape
  3. 3. The number of minutes for the earth to rotate 1 degree
  4. 4. Two days of a year where it is exactly 12 hours
  5. 5. 23hrs and 56mins. One complete rotation with respect to distant stars
  6. 6. When the light part of the Moon is shrinking over the month
  7. 7. The phase where the entire moon can be seen
  8. 12. Only a thin sliver of the moon can be seen
  9. 14. Three quarters of the moon can be seen