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aristotle was a philosepher from 384-322 BC. he was also a scientist. he studied under the great philosopher plato. aristotle did logic mathematics and others. he is called the grand father of science he belived in a geocentric universe and that the planets and stars were perfect spear thourgh earth itself was not. aristotle is a towering figure in ancient greek. he bileved that the sun and moon orbited around the earth. aristotle belived that the earth was the center of the universe.
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ptolemy wrote almagest a set of astronomy manuals which catalogues the stars eclipes the moovment of the sun and moon.
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read ptolemys almagest and proposed coperican heliocentricism.
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spent 20 years of his life talking the most precise measurements within 2 arc minutes
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was a lens maker from germany but moved to the netherlands
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tycho brahe assistant. discovered that the orbit of the planets are not circular.
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used a telescope to prove not all things revoled around the earth.
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further developed works of Copernicus and Kepler using math
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discovered the planet uranus and its moon. he also discovered 2 saturn moons.
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discovered the planet pluto and studied the canalis.
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discovered the ratio waves are emanting from space.
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using the color of the stars discovered the universe
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theory of relativity 1905 and gravitation.
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russia was succsefull puting the satelight into space.
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first human to orbit earth
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1st us citizen to orbit earth
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one of the inventors hertzsprung russel diagram
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walks the moon
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to land humans on the moon
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a reflecting telescope is two mirrors instead of two lens. refract is water,air and glass.
