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276 BCE
Eratosthenes of Cyrene is Born
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Period: 276 BCE to 194 BCE
Eratosthenes of Cyrene
Greek mathematician, geographer, poet, astronomer, and music theorist who became a chief librarian at the Library of Alexandria. He made the first accurate calculation of the circumference of the Earth. -
85
Claudius Ptolemy is Born
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Period: 85 to 165
Claudius Ptolemy
Astronomer and mathematician who created the geocentric theory. -
1473
Nicolaus Copernicus is Born
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Period: 1473 to 1543
Nicolaus Copernicus
Astronomer and mathematician who formulated the heliocentric theory. -
Period: 1543 to
Galileo Galilei
Astronomer, physicist, and engineer who discovered four massive moons of Jupiter and found evidence which supported the heliocentric theory. -
1546
Tycho Brahe is Born
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Period: 1546 to
Tycho Brahe
Danish nobleman, astronomer, astrologer, alchemist, and writer known for his precise astronomical observations. -
1561
Francis Bacon is Born
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Period: 1561 to
Francis Bacon
English philosopher credited with developing the scientific method and called the father of empiricism. -
1564
Galileo Galilei is Born
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1571
Johannes Kepler is Born
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Period: 1571 to
Johannes Kepler
German astronomer, mathematician, and astrologer who was a key figure in the scientific revolution. He is best known for his three laws of planetary motion. -
René Descartes is Born
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Period: to
René Descartes
French philosopher, mathematician, and scientist. He is called the first modern philosopher. He connected geometry and algebra. He said, "I think, therefore I am." -
John Locke is Born
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Period: to
John Locke
English philosopher and physician, regarded as one of the most influential Enlightenment thinkers.He believed that everyone is born with certain "inalienable" rights. -
Isaac Newton is Born
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Period: to
Isaac Newton
Mathematician, astronomer, physicist, and theologian who developed calculus, the laws of motion, and universal gravitation. -
Dmitri Mendeleev is Born
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Period: to
Dmitri Mendeleev
Organized the periodic table of elements, progressing the field of chemistry. -
Marie Curie is Born
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Period: to
Marie Curie
Physicist and chemist who won two Nobel prizes, most notable for her studies in radioactivity. Curie discovered elements polonium and radium. -
Henrietta Leavitt is Born
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Period: to
Henrietta Leavitt
Astronomer who discovered how to find the distances of stars based on light. -
Alfred Wegener is Born
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Period: to
Alfred Wegener
German polar researcher, geophysicist, and meteorologist who first proposed the idea of continental drift. His theory was unsubstantiated by real evidence, however. -
Edwin Hubble is Born
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Period: to
Edwin Hubble
Astronomer who discovered the existence of galaxies other than the Milky Way and that the universe is expanding. -
Harry Hammond Hess is Born
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Period: to
Harry Hammond Hess
Geologist and United States Navy Officer. He is considered one of the founding fathers of the plate tectonics theory. He made observations of the deep ocean seafloor and the magma which rose from mid-ocean ridges.
