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6 BCE
Early Hominids Appear
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100
Ptolemy
Earth, he argued, is a stationary sphere at the centre of a vastly larger celestial sphere that revolves at a perfectly uniform rate around Earth, carrying with it the stars, planets, Sun, and Moon—thereby causing their daily risings and settings. -
194
Eratosthenes
A Greek polymath: a mathematician, geographer, poet, astronomer, and music theorist who made the first measurement of the size of Earth for which any details are known. -
Feb 19, 1473
Copernicus
Nicolaus Copernicus was a Renaissance-era mathematician and astronomer, who formulated a model of the universe that placed the Sun rather than Earth at the center of the universe, in all likelihood independently of Aristarchus of Samos, who had formulated such a model some eighteen centuries earlier. -
Feb 15, 1564
Galileo
Of all of his telescope discoveries, he is perhaps most known for his discovery of the four most massive moons of Jupiter, now known as the Galilean moons: Io, Ganymede, Europa and Callisto. When NASA sent a mission to Jupiter in the 1990s, it was called Galileo in honor of the famed astronomer. -
Brahe
A Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical observations and in measuring and fixing the positions of stars paved the way for future discoveries. -
Bacon
An English philosopher and statesman who served as Attorney General and as Lord Chancellor of England. His works are credited with developing the scientific method and remained influential through the scientific revolution. Bacon has been called the father of empiricism. -
Kepler
A German astronomer, mathematician, and astrologer. He is a key figure in the 17th-century scientific revolution, best known for his laws of planetary motion -
Newton
In mechanics, his three laws of motion, the basic principles of modern physics, resulted in the formulation of the law of universal gravitation. -
Descartes
A French philosopher, mathematician, and scientist. He invented analytical geometry and introduced skepticism as an essential part of the scientific method. -
Locke
Locke's empiricist epistemology (he was the founder of empiricist theory of knowledge) inspired Berkeley, Hume, and the later years of empiricism. It provides a thorough account of how we acquire everyday, numerical, scientific, religious and ethical knowledge. -
Mendeleev
Image result for mendeleev birthday famous for
Mendeleev is best known for his discovery of the periodic law, which he introduced in 1869, and for his formulation of the periodic table of elements. -
Curie
A towering figure in the history of chemistry and physics, Marie Curie is most famous for the discovery of the elements polonium and radium. -
Leavitt
A graduate of Radcliffe College, she worked at the Harvard College Observatory as a "computer", tasked with examining photographic plates in order to measure and catalog the brightness of stars. -
Hubble
Edwin Powell Hubble was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time. -
Wegener
Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents. -
Hess
A geologist who was considered one of the "founding fathers" of the unifying theory of plate tectonics. -
today
today