Astronomy Topic 1 - Earth

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Across
  1. 2. The rusty orange haze cauzed by strong artificial lights
  2. 7. The name of the scale to categorise seeing conditions
  3. 8. Seeing conditions are affected by turbulence in the atmosphere, so stars appear to...
  4. 9. March 20-21, and September 22-23
  5. 11. The Sun and planets appear to move through this plane
  6. 14. For the Northern hemisphere winter, the sun is directly above here
  7. 16. Allowing 20mins for your eyes to become accustomed to darkness
  8. 20. The four rocky planets closest to the sun
  9. 21. The Earth's crust is broken into sections
  10. 22. The Earth's magnetosphere is caused by the convection of iron and...
Down
  1. 1. Powerful nearby lights that cause nightblindness to those nearby
  2. 3. the thickest layer of the Earths internal divisions
  3. 4. The prime meridian for the Earth's longitude
  4. 5. The sun rises in the...
  5. 6. The natural point of 0 degrees latitude
  6. 10. For the Northern hemisphere winter the sun does not rise above this line
  7. 12. If viewed from above the North Pole, which direction is the Earth spinning
  8. 13. North, East, South, West
  9. 15. The Older, low-density crust of the Earth
  10. 17. the Shape of most large bodies like planets
  11. 18. For the Earth's coordinate system, this reference line goes E-W
  12. 19. June 20-22, and December 21-22