Galileo discovered that Venus goes through a cycle of phases like the Moon. This suggested that
A) Venus moved about the Sun
B) the Earth moved about the Sun
C) Venus moved about the Earth
D) the Sun moved about the Earth

Question

Quizplus · Accepted Answer

Galileo's observation of Venus's phases indicated that Venus orbits the Sun, as the phases could only be explained if Venus was illuminated by the Sun from different angles, consistent with a heliocentric model.

Galileo Discovered That Venus Goes Through a Cycle of Phases