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Feb 19, 1473
Nicolaus Copernicus
Was the first to say that the planets evolved around the sun -
Dec 14, 1546
Tycho Brahe
Made obserations of planetary motion, which helped Kepler make our model of the solar system -
Feb 15, 1564
Galileo Galilei
Invented a better telescope. Made contributions in technology, physics, mathematics, and astronomy. He believed that the sun was the center of the solar system -
Dec 27, 1571
Johannes Kepler
He invented logbooks, which were used to calculate planetary positions. Made the 3 planetary laws of motion -
Giovanni Cassini
Was the first to observe at least 4 of saturn's moons; Iapetus, Rhea, Tethys, and Dione. -
Sir Isaac Newton
He proposed laws that described the motion of everything in the universe. He discovered many discoveries without them we would not be able to safely go into space. -
Edmond Halley
The first to see a comet called Halley's comet. He was known for inventing the diving bell. -
Charles Messier
First in France to observe the return of Halley's comet. He was called the comet ferret and discovered many comets -
William Herschel
He discovered the planet Uranus. Developed the theory of stellar evolution. -
Annie Jump Cannon
She was able to identify and classify stars very accurately and very fast. By the time she died she had classified about 350,00 stars at a rate of 300 per hour -
Albert Einstein
Contributed the theory of Relativity and The Quantum Theory -
Edwin Hubble
Hubble was able to prove the expansion of the universe He helped the astronomers measure distance in the universe. -
Carl Sagan
Created the television series: Cosmos: a personal voyage. He made science popular. In the late twentieth century he wasthe world's best known scientist. -
Stephen Hawking
He is a Physcist. He studies black holes
