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Feb 19, 1473
Nicolaus Copernicus
He formulated a heliocentric model of the universe which placed the sun, rather than the earth, at the center. -
Dec 14, 1546
Tycho Brahe
He designed and built new instruments, calibrated them, and institued nightly observation. -
Feb 15, 1564
Galilo Galilei
He invented the telescope. He could now look at the sky in a new way. This invention helped support Copernicus's therory. -
Dec 27, 1571
Fohannas Kepler
He developed Kepler's 3 laws of planetary motion. -
Giovanni Cassini
He was an Italian/French mathamatician, astronomer, engineer, and astrologer. He discoverd four satelilites of the planet Saturn. -
Sir Isaac Newton
He discovered Gravity. He belived that some forces pushed the planets together. He belived that a moving object will continue to move at a constent speed and in a straight line. This is called inertia. -
Edmond Halley
He computed the orbit of eponymous Halley's Comet. -
Charles Messier
He is most notable for publishing an astronomical catalngue consisting of nebula and star clusters that cameto be known as the 110 "Messier Objects" A messier object is a set of astronomical object first listed by Charles Messier. -
William Herschel
He was a Hanoverian-born British astronomer, technical expert, and composer. He also discoverd Uranus and infrared radiation. -
Annie Jump Cannon
She was an American astronomer whose catalonging work was instrumental in the development of contemporary stellar classification. -
Albert Einstein
He was a German-born theoretical physicist. He developed the general theory of relativity, one of the two pillars of modern physics. -
Edwin Hubble
He was an American astronomer who played a crucial role in establishing the field of extragalactic astronomy and is generally regarded as one of the most important observational cosmologist of the 20th century. -
Frank Drake
He is an American astronomer and astrophyscist. He is most noble as one of the pioneers in the search for extraterrestrial intelligence. -
Carl Sagan
He was an American astronomer, asrophysicist, cosmologist, author, science popularizer and science communicator in astronomy and natural sciences. -
Stephan Hawking
He is an English theoretical physcist, cosmologist, author and director of research at the Centre for Theoretical Cosmology within the University of Cambridge.
