Galileo's observations of a complete set of phases of Venus proved
A)that Venus orbited the Sun.
B)that Earth orbited the Sun.
C)that all of the planets orbited the Sun.
D)that the Moon orbited Earth.
E)that Venus had an atmosphere.

Question

Quizplus · Accepted Answer

Galileo's observations of Venus showing a complete set of phases similar to those of the Moon were critical in supporting the heliocentric model. These observations could only be explained if Venus orbited the Sun, demonstrating that not everything in the sky orbited the Earth. This was a significant piece of evidence against the geocentric model, which was the prevailing view at the time.

Galileo's Observations of a Complete Set of Phases of Venus