Galileo Galilei

author

Galileo Galilei

1564–1642

A brilliant observer of the skies, this Italian mathematician and natural philosopher helped change how people understood motion, astronomy, and the place of Earth in the universe. His clear-eyed experiments and bold defense of heliocentrism made him one of the defining figures of the Scientific Revolution.

2 Audiobooks

A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany, Concerning the Natation of Bodies Vpon, and Submersion In, the Water.

A Discourse Presented to the Most Serene Don Cosimo II., Great Duke of Tuscany, Concerning the Natation of Bodies Vpon, and Submersion In, the Water.

by Galileo Galilei

The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries

The sidereal messenger of Galileo Galilei : and a part of the preface to Kepler's Dioptrics containing the original account of Galileo's astronomical discoveries

by Galileo Galilei, Johannes Kepler

About the author

Born in Pisa in 1564, Galileo Galilei became one of the most influential thinkers of early modern science. He studied mathematics and taught in Pisa and Padua, where he developed a reputation for combining careful observation with hands-on experiment.

Galileo is especially known for improving the telescope and using it to study the heavens. His observations of the Moon, the moons of Jupiter, and the phases of Venus provided powerful evidence that challenged older ideas about the cosmos and supported the Sun-centered model associated with Copernicus.

He also made major contributions to the study of motion and mechanics, helping shape a more experimental approach to physics. Late in life, his support for heliocentrism brought him into conflict with the Roman Catholic Church, and he spent his final years under house arrest near Florence, where he died in 1642.