Galilean telescope

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Galileo's telescopes

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Infinite space background with silhouette of telescope. This image elements furnished by NASA.

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Where Did the Moon Come From?

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Arrangement of the phases of the moon in total eclipse with Blood Moon

9 Celestial Omens

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Colorful winter sunset

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General Pershing's troops moving into Mexico in 1917 during World War I.

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Charles Darwin, carbon print photograph by Julia Margaret Cameron, 1868.

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Berlin, 1936 - Jesse Owens of the USA in action in the mens 200m at the Summer Olympic Games. Owens won a total of four gold medals.

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The Castillo, a Toltec-style pyramid, rises 79 feet (24 meters) above the plaza at Chichen Itza in Yucatan state, Mexico. The pyramid was built after invaders conquered the ancient Maya city in the tenth century.

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Duel between Aaron Burr and Alexander Hamilton, illustration after a painting by J. Mund.

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Galilean telescope: Related Content

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Galileo's telescopes

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Key People

Galileo

Galileo

Italian philosopher, astronomer and mathematician

Quiz

Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.

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