Winter nightsky

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Across
  1. 4. Major Orion’s hunting dog with bright star Sirius
  2. 8. Instrument used to observe distant stars
  3. 10. Study of stars’ influence on human affairs
  4. 12. Prominent hunter constellation visible in winter
  5. 13. The brightest star in the night sky
  6. 14. Long constellation representing a river
  7. 15. Bright blue star in Orion’s foot
  8. 18. Relating to the sky or outer space
  9. 19. Bright star in Auriga
Down
  1. 1. Red supergiant star in Orion
  2. 2. Minor Smaller dog constellation near Gemini
  3. 3. Cloud of gas and dust in space
  4. 5. Stories behind constellations
  5. 6. The twins, a zodiac constellation seen in winter
  6. 7. Group of stars forming a pattern
  7. 9. Band of constellations through which the sun appears to move
  8. 10. The charioteer constellation
  9. 11. Bull-shaped constellation near Orion
  10. 16. The other twin in Gemini
  11. 17. Star cluster in Taurus, also called Seven Sisters
  12. 18. One of the twins in Gemini
  13. 20. Scientific study of celestial bodies