11. Earth-centered "'ecliptic coordinates "'as seen from outside the celestial sphere . 12. The soul is a substance more delicate even than that of the celestial spheres . 13. After an initial ascension, Beatrice guides Dante through the nine celestial spheres of Heaven. 14. This direction corresponds to a point on the celestial sphere . 15. When we say " celestial sphere " we don't say " heavenly sphere ". 16. The celestial sphere is conventionally divided into regions called constellations. 17. "' Ptolemy instructing Regiomontanus "'under an image of the zodiac encircling the celestial spheres . 18. The video to the right represents the polarization angle mapped onto the celestial sphere . 19. Medieval astronomers and philosophers developed diverse theories about the causes of the celestial spheres 'motions. 20. Each star's approximate position on the celestial sphere is given using the equatorial coordinate system.
