II. THE BEGINNINGS OF ASTRONOMY. Gnomons and clepsydras; the constellations and the calendar; astrology and star-worship; early cosmogonies 25 III. GREEK ASTRONOMY: FIRST PERIOD. B.C. 900 to B.C. 350 1. Homeric Greece; First Notions of Astronomy 51 2. Thales and Anaximander: Earth flat, heaven a series of hemispheres 55 3. Later Flat Earth Systems: the Universe a sphere 60 4. Pythagoras and his Followers: Earth round, Earth in Motion 66…
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