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(Around 150) Ptolemy writes probably one of his most important books, The Almagest.
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(230 BC) Aristarchus of Samos, the ancient Greek anstronomer and mathematician, dies.
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(236 BC) Eratosthenese moves to Alexandria and becomes the Chief Librarian at the Great Library of Alexandria.
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(Approximately around 270 BC) Aristarchus believed the Earth revolved around the Sun, not the other way around.
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(276 BC) Eratosthenese of Cyrene, Greek mathematician, geographer, poet, athlete, astronomer, music theorist, and third chief librarian of the Great Library of Alexandria, was approximately born.
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(310 BC) Aristarchus of Samos, the ancient Greek anstronomer and mathematician, was born.
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(350-370) Hypatia, a Greek Neoplatonist philosopher, was born.
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(370 BC) Democritus, an Ancient Greek philosopher, dies.
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As head of the Platonist school at Alexandria, Hypatia taught also philosophy and astronomy, along with imparting the knowledge of Plato and Aristotle to her pupils.
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Hypatia, a Greek Neoplatonist philosopher, dies.
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(460 BC) Democritus, an Ancient Greek philosopher, was born.
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Pythagoras moves to Croton and sets up a religious sect, named Pythagoreanism.
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(570 BC) Pythagoras of Samos, Ionian Greek philosopher, mathematician, and founder of the religious movement Pythagoreanism, was born.
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Nicolaus Copernicus, Renaissance astronomer, was born.
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Copernicus is awarded the Doctor of Canon Law degree at the University of Ferrara.
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Johannes Kepler, the German mathematician, astronomer, and astrologer, was born.
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Nicolaus Copernicus, Renaissance astronomer, dies.
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Galileo Galilei, Italian physiciast, mathematician, astronomer, and philosopher, was born.
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Kepler wrote "Somnium" (or "The Dream", in English) around the time span of 1620-1630.
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Johannes Kepler, German mathematician, astronomer, and astrologer, dies.
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Galileo has permission to move back to his home in Florence, so he may be closer to the medical attention he need.
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Galileo Galilei, Italian physicist, mathematician, astronomer, and philosopher, dies.
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(90) Claudius Ptolemy, the mathematician, astronomer, geographer, astronomer, and poet, was born,
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(195 BC) Eratosthenese of Cyrene, Greek mathematician, geographer, poet, athlete, astronomer, music theorist, and third chief librarian of the Great Library of Alexandria, approximately died.
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(495 BC) Pythagoras of Samos, Ionian Greek philosopher, mathematician, and founder of the religious movement Pythagoreanism, dies.
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Claudius Ptolemy, the mathematician, astronomer, geographer, astronomer, and poet, dies.
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The approximate date of Democritus' discovery of the Atomic Theory.
