1620 Johannes Kepler Astronomer Portrait is a photograph by Paul D Stewart which was uploaded on July 29th, 2016.
1620 Johannes Kepler Astronomer Portrait
Johannes Kepler (1571-1630), Engraving from Vies des Savants Illustres (1876). German astronomer who devised the three fundamental laws of planetary... more
Title
1620 Johannes Kepler Astronomer Portrait
Artist
Paul D Stewart
Medium
Photograph
Description
Johannes Kepler (1571-1630), Engraving from Vies des Savants Illustres (1876). German astronomer who devised the three fundamental laws of planetary motion. These laws were based on detailed observations of the planets made by Tycho Brahe and himself. Kepler's first law states that the planets orbit the Sun in elliptical paths, with the Sun at one focus of the ellipse. The second law states that the closer a planet comes to the Sun, the faster it moves. Kepler's third law states that the ratio of the cube of a planet's mean distance from the Sun to the square of its orbital period is a constant. Newton used these ideas to formulate his theory of gravity.
Uploaded
July 29th, 2016
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