One Phrase, One Word

1234567891011121314151617181920
Across
  1. 4. a moment in time
  2. 6. equal night
  3. 8. north polar distance
  4. 9. study of position and movements of celestial bodies
  5. 12. astronomical almanacs
  6. 14. point directly beneath the observer
  7. 16. April 8, 2020, 10:35 am PST
  8. 17. parallels of latitude
  9. 18. star crosses the local meridian
  10. 20. imaginary belt around the heavens
Down
  1. 1. angle between the celestial equator and the ecliptic
  2. 2. two extreme points in the orbit of a planetary body about its primary body
  3. 3. regions of the sky
  4. 5. wobble motion
  5. 7. pattern of stars
  6. 10. diurnal rotation of the Earth on its axis
  7. 11. scientific study of celestial objects
  8. 13. 206,265 astronomical units
  9. 15. pedestal of a sundial
  10. 19. sun stands still