Galileo's Telescopic Revolution

"In 1609, a curious mathematician lifted a crude telescope toward the night sky — and what he saw shattered centuries of belief. Galileo Galilei’s first glimpse of the heavens revealed mountains on the Moon, countless unseen stars, and the moons of Jupiter circling a distant world. In this episode of When Science Changed Time, discover how a single night of stargazing forever transformed our place in the cosmos."