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Across
  1. 3. half of a round 3d shape
  2. 4. active at night
  3. 6. when the sun is at greatest distance from equator
  4. 7. relating to a devine heaven
  5. 8. when the sun crosses the plane of the equator
Down
  1. 1. characteristic of winter
  2. 2. relating to twilight
  3. 5. configuration of stars as seen from Earth