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276 BCE
Eratosthenes was born
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165 BCE
Ptolemy was born
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127 BCE
Ptolemy made his most original contribution by presenting details for the motions of each of the planets
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100 BCE
Ptolemy died
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Feb 19, 1473
Copernicus was born
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1532
Copernicus established that the planets orbited the sun rather than the Earth. He laid out his model of the solar system and the path of the planets.
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May 24, 1543
Copernicus died
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Dec 14, 1546
Brahe was born
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Jan 22, 1561
Bacon was born
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Feb 15, 1564
Galileo was born
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Dec 27, 1571
Kepler was born
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Descartes was born
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Galileo built his first telescope, improving upon a Dutch design
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Locke was Born
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Galileo died
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Newton was born
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Newton made many advancements in the field of science and mathematics, he discovered Gravity, developed the three basic laws of motion, and co-development of Calculus
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Newton died
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Mendeleev was born
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Curie was born
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Leavitt was born
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Mendeleev discovered the periodic law
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Wegener was born
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Hubble was born
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Curie successfully isolated radioactive radium salts from the mineral pitchblende in their laboratory in Paris
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Hess was born
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Mendeleev died
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Hubble discovered that countless galaxies exist beyond our own Milky Way galaxy
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Leavitt discovered that some of these stars have a consistent brightness no matter where they are located, making these so-called Cepheid variables a good measuring stick for astronomical distances.
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Leavitt died
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Curie died
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Hubble died
