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