Proposition 1. Two equal spheres are comprehended by one an… - Aristarchus of Samos

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Proposition 1. Two equal spheres are comprehended by one and the same cylinder, and two unequal spheres by one and the same cone which has its vertex in the direction of the lesser sphere; and the straight line drawn through the centres of the spheres is at right angles to each of the circles in which the surface of the cylinder, or of the cone, touches the spheres.

Aristarchus of Samos

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About Aristarchus of Samos

Aristarchus of Samos (c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who devised the first known model envisioning the Earth in motion, orbiting around the Sun, or "central fire," at the center of the universe. He was influenced by Philolaus, and argued, like Anaxagoras before him, that the stars were entities similar to the sun. His astronomical ideas were in large rejected in favor the prevailing geocentric models of Aristotle and Ptolemy, until De revolutionibus orbium coelestium was published in 1543 by Copernicus, who was influenced by the work of Aristarchus through a close reading of Greek and Latin authors. The only known extant work by Aristarchus is "On the Dimensions and Distances of the Sun and Moon" which does not discuss his thesis on heliocentrism.

Also Known As

Native Name: Ἀρίσταρχος ὁ Σάμιος • Αρίσταρχος ο Σάμιος

Alternative Names: Aristarchos of Samos

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Originators like Aristarchus of Samos:

Nicolaus Copernicus William Herschel James Bradley Howard P. Robertson David Gregory

Additional quotes by Aristarchus of Samos

Proposition 17. The diameter of the earth is to the diameter of the moon in a ratio greater than [2.51] that which 108 has to 43, but less than [3.16] that which 60 has to 19.

Proposition 5. When the moon appears to us halved, the great circle parallel to the circle which divides the dark and the bright portions in the moon is then in the direction of our eye; that is to say, the great circle parallel to the dividing circle and our eye are in one plane.

Proposition 4. The circle which divides the dark and the bright portions in the moon is not perceptibly different from a great circle in the moon.

Proposition 1. Two equal spheres are comprehended by one and the same cylinder, and two unequal spheres by one and the same cone which has its vertex… - Aristarchus of Samos

About Aristarchus of Samos

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