5. What objects did Galileo discover with his telescope that clearly didn't go around the Earth?

answered

Explanation:

Galileo after discovering and observing the brightest planet of the solar system Venus, and its phases and then observing The moon and the Sun, confirmed that it was the Earth (planets) that revolved around the Sun and not the other way round.

Galileo used "spyglass" a device used to look into distant object and made it closer and larger to our eyes.