Astronomy Unit 1: Sense of Scale and Celestial Sphere

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Across
  1. 3. the brightness of a star
  2. 5. stars, Sun and Moon set in this direction
  3. 8. horizontal distance from a point east on the celestial equator (2 words)
  4. 9. distance based on parallax shift
  5. 13. 12 constellations which the Sun appears to pass through
  6. 14. a grouping of stars
  7. 15. imaginary sphere where Earth is at the center and all stars lie (2 words)
  8. 17. a constellation that is always visible in the sky
  9. 19. dimmest magnitude observable with naked eye
  10. 20. stars with a higher magnitude
  11. 21. apparent shift in location
  12. 23. Earth is approximately this many times bigger than Moon
Down
  1. 1. the wobble of the Earth's rotation
  2. 2. Sun is approximately this many times bigger than Earth
  3. 4. distance from Sun to Earth (2 words)
  4. 6. stars, Sun and Moon rise from this direction
  5. 7. asterism within Ursa Minor, North star is on its handle (2 words)
  6. 10. horizontal angle from due North
  7. 11. winter constellation known as the hunter
  8. 12. star at the north celestial pole
  9. 16. the apparent path of the Sun
  10. 18. distance light travels in one year (2 words)
  11. 20. angular distance above or below celestial equator
  12. 22. vertical angle from the horizon