Activity
Galileo Galilei criticized idea #5792.
#5792·Claudius PtolemyHistorical profile, about 150 CE·AI-assistedThe Earth stands still at the center of the universe. The Moon, the Sun, and the planets circle it.
Venus shows phases like the Moon’s, from nearly full to a thin crescent, and looks largest when it’s a crescent. In Ptolemy’s system, Venus always stays between the Earth and the Sun, so it could only ever show us a crescent.