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sphere of the universe is the earth. The poles of the sphere are the extremities of the axis on which it turns. The horizon cuts the sphere into two hemispheres, the one superior and the other inferior to the earth. The sky, which is continually turning, encircles all, one half of it being above, the other below the earth, which is as far removed from the superior part of the heavens as from the inferior.48

       NOTES

      30 Cicero’s allusion to Thales, cited p. 16, is probably a reference to a tradition.

      31 Wolf, R. Geschichte der Astronomie. München, 1877, p. 193; Gassendi, P. Opera Omnia. Leipzig, 1658. Vol. V, p. 375. See statement by Cicero, cited below, p. 17.

Aries Cancer Libra Capricornus
Taurus Leo Scorpio Aquarius
Gemini Virgo Sagittarius Pisces

      The Northern Hemisphere.

Andromeda Corona Lyra Ursa Major
Aquila Cygnus Ophiuchus Ursa Minor
Auriga Delphinus Pegasus Sagitta
Boötes Draco Perseus
Cassiopeia Equuleus Serpens
Cepheus Hercules Triangulum

      The Southern Constellations.

Ara Cetus Crater Lupus
Argo Navis Centaurus Eridanus Orion
Canis Major Corona Australis Hydra Piscis Australis
Canis Minor Corvus Lepus

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