Galileo's telescopic discoveries of mountains on the Moon and spots on the Sun were controversial because they suggested something about the Sun and Moon.What was it?

Question

Quizplus · Accepted Answer

Galileo's discoveries of mountains on the Moon and spots on the Sun suggested that these objects were not perfect spheres, as previously believed. This was controversial because it challenged the Aristotelian view that the celestial bodies were perfect and unchanging.

Galileo's Telescopic Discoveries of Mountains on the Moon and Spots