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Astronomer and mathematician who accurately measured the circumference of the Earth.
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His first major astronomical work, the Almagest, was completed about 150 CE and contains reports of astronomical observations that Ptolemy had made over the preceding quarter of a century. T
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Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System.
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German astronomer who discovered three major laws of planetary motion, conventionally designated as follows: (1) the planets move in elliptical orbits with the Sun at one focus; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between the central body and that arc (the “area law”); and (3) there is an exact relationship between the squares of the planets’ periodic times and the cubes of the radii of their orbits (the “harmonic law”).
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November 11, 1572. He saw a light brighter than Venus, a star.
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Newton developed the three laws of motion which form the basic principles of modern physics. His discovery of calculus led the way to more powerful methods of solving mathematical problems.
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German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science.