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236 BCE
Eratosthenes becomes the chief librarian of the library in Alexandria
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85 BCE
Ptolemy
He was born, studied the geocentric view, and died around this period. -
85 BCE
Ptolemy
He was born, studied, and died around this time period. -
236
Eratosthenes measures the circumference of the Earth
The date is not known, but is after 236 BCE -
1100
Ptolemy- 12 century
During the 12th century, his book was translated to latin, and his ideas were spread all throughout Europe. -
Feb 19, 1473
Copernicus was born
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1514
Copernicus wrote "The Little Commentary"
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May 23, 1543
Copernicus died
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Dec 14, 1546
Tycho Brahe is born
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Jan 22, 1561
Francis Bacon is born
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Feb 15, 1564
Galileo was born
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Feb 15, 1564
Galileo was born
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Dec 27, 1571
Kepler is born
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Rene Descartes is born
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Tycho Brahe dies
He died of kidney failure -
Galileo improved the telescope
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Galileo published "Letters in Sunspots"
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Francis Bacon dies
He died of pneumonia -
Kepler dies
Kepler dies of Acute Disease -
Period: to
John Locke's theory
Locke believed that human nature is characterised by reason and tolerance. -
John Locke is born
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Galileo died
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Descartes says "Cogito, ergo sum."
"Cogito, ergo sum." means "I think, therefore I am." -
Newton was born
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Rene Descartes dies
He died of pneumonia -
John Locke dies
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Newton dies
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Leavitt hired at Harvard
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Alfred Wegener is born
He was born in Berlin to a protestant pastor -
Leavitt publishes her paper on period-luminosity correlation
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Wegener co-writes "
Co-writes the textbook "The Thermodynamics of the Atmosphere" -
Wegener writes "The Origins of Continents and Oceans"
It claimed that there was a supercontinent called Pangea 300 million years ago. -
Leavitt dies of cancer
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Hubble discovers that Andromeda is 1 million light years away and is a galaxy.
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Hubble discovers that the galaxy is expanding out
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Wegener dies
He and his companion die on their return trip from Antarctica -
Hess discovers that the seafloor is not smooth
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Hubble helped complete and was the first to use the Hale telescope
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Hubble dies of a heart attack in San Marino, California.
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Hess writes "The Origin of Ocean Basins
His theory in the book becomes known as seafloor spreading