Nature

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Across
  1. 4. a natural appearance of coloured light in the sky that is usually seen in the latitudes
  2. 5. outer atmosphere of the Earth
  3. 8. water, especially from a river or stream, dropping from a higher to a lower point
  4. 10. season between summer and winter
  5. 11. the large star that heats our planet
Down
  1. 1. the galaxy that includes the earth, seen at night as a pale strip across the sky
  2. 2. celestial body with its own motion
  3. 3. the natural satellite that orbits Earth
  4. 6. visible condensed water vapor in the sky
  5. 7. an arch of different colors seen in the sky when rain is falling and the sun is shining
  6. 9. we had three rainy days on holiday, but otherwise it was sunny