One of the very first men to study the skies by means of a telescope, Galileo interpreted what he saw as support for a notion that was still hotly disputed in his day: The earth revolves around the sun and therefore our planet is not the center of the universe.
Olles esimesi mehi, kes oli uurinud tähistaevast teleskoobiga, andis Galilei nähtule seletuse, mis toetas üht tema päevil ikka veel tuliseid vaidlusi tekitanud ideed: Maa tiirleb ümber Päikese, mistõttu meie planeet pole universumi keskpunkt.