Galileo Galilei

Galileo Galilei

Galileo Galilei

Italian astronomer and mathematician Galileo Galilei built his first telescope in 1609. Using it he saw craters and mountains on the Moon.

The next year he discovered four moons orbiting Jupiter: Io, Ganymede, Europa and Callisto (a German astronomer, Simon Marius is thought to have independently discovered them at the same time).

Galileo is best known for gathering evidence that supported the Copernican theory that the Earth revolved around the Sun. At the time, Galileo's discoveries were controversial because they challenged the Catholic Church's beliefs and resulted in him being put on trial and imprisoned.

Photo: Illustration showing Galileo in 1638 (Mary Evans Picture Library)

Watch and listen to clips from past programmes TV clips [4] Radio Programmes [3]

Galileo Galilei

About Galileo Galilei

The Italian astronomer challenges orthodox views.

About Galileo Galilei

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