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Download e-book for iPad: Cleomedes' Lectures on Astronomy: A Translation of ''The by Cleomedes

By Cleomedes

ISBN-10: 0520233255

ISBN-13: 9780520233256

Cleomedes' treatise was once a milestone within the background of astronomy, and is a useful source for college kids of historic Stoicism to boot.

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Extra resources for Cleomedes' Lectures on Astronomy: A Translation of ''The Heavens''

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36 / Cleomedes’ The Heavens convert,67 in that we become circumhabitants of our circumhabitants, antipodes of our antipodes, and similarly contrahabitants of our contrahabitants. 235: Yet in relation to each of these [ groups] we have something in common, as well as distinct. 68 But there is a diªerence in their daytimes and nighttimes: when it is daytime in our zone, it must be nighttime in theirs, and vice versa, although this is put too loosely. For it is not by precise reckoning that the Sun begins to rise in their zone when it sets in ours, since in that case the nighttime in their zone would be long when the daytime in ours was long, and their seasons, that is, the lengthening and shortening of their daytimes and nighttimes, would be the reverse of ours.

Phys. 203b25–30. 40. 1–4 and 34–35), is a preliminary idea, reached by rudimentary reasoning and requiring further refinement. Thus here we cannot naturally form a notion of body that is not finite (Sorabji [1988] 140 suggests Arist. Phys. 204b5–7 as a precedent), but need a demonstration (at lines 133–139 below) that an infinitely enlarged cosmos is inconceivable. In the Caelestia Cleomedes shows no interest in the origin of such notions; that is, he does not identif y them as “natural” or “common,” or see them as “preconceptions” ( prolèpseis).

De comm. not. 163, 165, and 301, and by Brunschwig (1988) 28–30. 45. Another Peripatetic argument (cf. lines 110–111 above) is that such a void is simply an imaginary conception; see Alex. Aphr. Quaest. 27–35, Alex. Aphr. at Simplic. 23–27, and Todd (1984). Thorp (1990) 159 –164 discusses the Aristotelian basis for this position. 46 From this it is evident that the external void cannot be limited anywhere. Therefore it is unlimited. 130: Indeed, just as it is thought that everything that is limited is enclosed by something (otherwise it would not be limited), so too the void, if limited, is necessarily enclosed by something.

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