Chapter Eight

Alan C. Bowen and Robert B. Todd

in Cleomedes' Lectures on Astronomy

Published by University of California Press

Published in print January 2004 | ISBN: 9780520233256
Published online March 2012 | e-ISBN: 9780520928510 | DOI:
Chapter Eight

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This chapter shows that the size of the Earth is discountable in observations of all heavenly bodies except the Moon. The Earth must have the ratio of a center to the whole cosmos. Sundials also offer a major proof that the Earth has the ratio of a center to the heliacal sphere, since the shadow of the Earth revolves along with the Sun. So while the Earth has the ratio of a point to the height of the Sun, some use other arguments to establish that it does not have the ratio of a point to the sphere of the Moon. The Sun's approach and its subsequent withdrawal are identified with respect to its relation to the zenith.

Keywords: size; Earth; heavenly bodies; cosmos; heliacal sphere; Sun; Moon

Chapter.  4060 words. 

Subjects: Classical Philosophy

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