Jump to ContentJump to Main Navigation
Cleomedes' Lectures on AstronomyA Translation of  The Heavens$
Users without a subscription are not able to see the full content.

Cleomedes and Lawrence Witmer

Print publication date: 2004

Print ISBN-13: 9780520233256

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520233256.001.0001

Show Summary Details
Page of

PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 18 May 2022

Chapter Five

Chapter Five

(p.145) Chapter Five
Cleomedes' Lectures on Astronomy

Alan C. Bowen

Robert B. Todd

University of California Press

This chapter states that the phases of the Moon are caused by its motion in relation to the Sun and the Earth. In accordance with its motion based on choice, it approaches the Sun at one time and withdraws from it at another, as it goes from conjunction to full Moon and from full Moon to conjunction, the light from the Sun goes round the whole Moon in its circuit of it. By moving relative to its illumination from the Sun, the Moon is, in other words, affected in just the same way as is the Earth through being stationary. The cause of the Moon's having differences in its shapes is explored. The conjunctions of the Moon with the Sun do not always maintain an equal time interval.

Keywords:   Moon, Sun, Earth, motion, conjunctions

California Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us.