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Feb 19, 1473
Nicholas Copernicus
Nicholas Copernicus came up with his own calestial model, a Heliocentric Plantary System. -
Dec 14, 1546
Tycho Brahe
Tycho Brahe built an observatory and instruments to study the sky. -
Feb 15, 1564
Galileo Galile
Galileo Galile discovered the phases of Venus and the four largest satellites of Jupiter. -
Dec 27, 1571
Johannes Kepler
Orbit of Mars, was an ellipse. Now called Kepler's first two laws of planetary motion. -
Giovanni Cassini
Giovanni Cassini discovered the satalites of Saturn and discovered the rings that surround Saturn. -
Sir Isaac Newton
Sir Isaac Newton built the first practical reflecting telescope and develped a theory of a color of visible spectrum -
Edmond Halley
Edmond Halley computed the orbit of the eponmous Halley's commet. -
Charles Messier
Chrles Messier published an astromical cataloge consisting of rebulse and star clusters (messier objects) -
William Herschel
William Herschel discovered the planet Uranus along with it's two major moons. -
Annie Jump Cannon
Annie Jump Cannon organized and published the stellar classification. -Created- Harvord classification scheme. -
Albert Einstein
Developed the theory of relativity. -
Edwin Hubble
Edwin Hubble showed the recessional velocity of a galaxy increases with it's distance from the earth. -
Frank Drake
Frank Drake searched for extra terrestrial intelligence, including the founding of SETI. -
Carl Sagan
Carl Sagan researched extraterrestrial life and demonstrated the production of amino acids from basic chemicals by radiation. -
Stephen Hawking
Stephen Hawking was the first to explain general theory of relativity and quantum mechanics.
