Chapter 2 - Night

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Across
  1. 2. This equator encircles the sphere of the stars
  2. 5. Our planet rotates in this direction
  3. 6. A large constellation that contains two of the brightest stars in the sky, Betelgeuse and Rigel
  4. 7. The point in the sky directly over the head of the observer
  5. 9. A constellation named for a queen that appears in our northern sky
  6. 12. An informal grouping of stars
  7. 14. The unseen extreme point below the horizon in the invisible half of the celestial sphere
  8. 15. Patterns of stars visible in the night sky
  9. 18. These are located at either end of the Earth's axis
  10. 20. The direction Polaris always points
  11. 21. Contains the asterism the Big Dipper
Down
  1. 1. This constellation can be seen near Orion and contains the star Aldabaran
  2. 3. Excessive glow of electric lights preventing total darkness
  3. 4. An ancient Greek who wrote a poem about the constellations called Phaenomena
  4. 8. The spherical dome-like appearance of the starry sky
  5. 9. Constellations which rotate around either pole are said to be this
  6. 10. This tool was used in ancient and medieval times to represent the celestial sphere
  7. 11. This asterism is contained within Ursa Minor
  8. 13. Cassiopeia and the Big Dipper appear to move in this direction around the North Star
  9. 16. an asterism and open star close called Seven Sisters
  10. 17. The North Star
  11. 19. Also known as the Dog Star, this is the brightest star
  12. 22. The motion of the stars to observers on Earth is not ACTUAL motion, but ___________ motion