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Feb 19, 1473
Nicholas Copernicus
He is known as the founder of atronomy. He was the first person to devise a conprehensive heliocentric cosmology which displaced the ceter of the universe. -
Dec 14, 1546
Tycho Brahe
His contribution to science was due to astronomy. He collected data that enabled Kepler to discover the laws of planetary motion. -
Feb 15, 1564
Galileo Galilei
He invented the thermometer. In 1609 he perfected the teloscope. -
Dec 27, 1571
Johannes Kepler
He is a key figure in the 17th century. He is known for his laws in planetary motion. -
Giovanni Cassini
Descovered four of saturn's moons and the ring structure of saturn. -
Sir Isaac Newton
His greatest discovery to science was the nature of gravity. His greatest work was tested with a drop of an apple. -
Edmond Halley
Edmond Halley contribution is best known for computing the orbit of the eponymous Halley's Comet. -
Charles Messier
He became famous when King Louis XV called him "my little comet ferret" and heis also for publishing an astronomical catalogue. -
Stephen Hawking
Known for his work with black holes. -
carl sagan
Asembled the first physical messages ever sent to space
