"INFERENTIAL EVIDENCE FOR THE PRE-TELESCOPIC SIGHTING OF THE CRESCENT VENUS". Retrieved 2010-08-11. ↑ souledout.org - Venus Has Phases ... Like the Moon ↑ Galileo's observations of the phases of Venus (slide 4) ↑ Phases of Venus 1 2 The Phases of Venus and Heliocentricity: A Rough Guide ↑ Galileo Galilei's Anagram ↑ Williams, David R.