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.
Galilejs nonāca pie secinājuma, ka viņa novērojumi apstiprina ideju, kas viņa dzīves laikā joprojām lielā mērā tika apšaubīta, proti, ka Zeme griežas apkārt Saulei un līdz ar to nav Visuma centrs.