What instruments did Galileo use to discover Saturn's rings?

Galileo had a telescope that magnified 30 times. It is likely he use that telescope or a similar one to see Saturn's rings. In 1610, the year after Galileo Galilei first turned a telescope to the sky, he became the very first person to observe Saturn's rings, though he could not see them well enough to discern their true nature.[1]. read more

Saturn History. Saturn has been known since prehistoric times because it is easily visible to the naked eye. Not until the invention of the telescope, however, did people observe Saturn's magnificent rings. Galileo Galilei was the first to observe Saturn with a telescope in 1610. read more