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6000 BCE
Hominids Appear(6 million years ago)
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Period: 6000 BCE to
Small scale
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276 BCE
Eratosthenes(276 BC)
who made the first measurement of the size of Earth for which any details are known. -
85
Ptolemy(85CE)
Theory of Geocentric View (Earth at center of universe) -
Feb 19, 1473
Copernicus
Theory of Heliocentric view(Sun at center of Universe) -
Dec 14, 1546
Tycho Brahe
Brahe showed irregularities in the Moon's orbit and observed planetary movements -
Jan 22, 1561
Francis Bacon
Insisted that science should be based on experiments that are proved -
Feb 15, 1564
Galileo
Known for making an improved version of the telescope we use today and discovering Jupiter's four moons -
Dec 27, 1571
Kepler
Kepler discovered that planets move in elliptical orbits -
Rene Descartes
believed everything should be doubted until proven by mathematics and logic
Rene descartes quote is “I think therefore I am” -
John locke
Locke believed that all knowledge is obtained with experience
Believed the distinction between primary and secondary qualities explained the disagreements that we all have about our perceptions of the outside world -
Newton
Discovered Law of the universal gravitation -
Mendeleev
Father of Periodic Table -
Marie Curie
Discovered elements radium and polonium -
Leavitt
Discovered relationship between the intrinsic brightness of a variable star and the time it took to vary in brightness -
Alfred Wegener
He proposed that the continents were once compressed into a single protocontinent which he called Pangaea -
Hubble
Discovered universe expanding through redshift -
Harry Hess
Got evidence of seafloor spreading when examining the ocean floor with sonar