Tycho Brahe, Kepler, and Galileo
Tycho Brahe, Kepler, and Galileo Astr 1010-100
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This 2 page One Day of Notes was uploaded by Alyssa Karounos on Sunday January 18, 2015. The One Day of Notes belongs to Astr 1010-100 at University of Washington taught by Dr. Oliver Fraser in Winter2015. Since its upload, it has received 292 views. For similar materials see Introductory Astronomy 1 in Astronomy at University of Washington.
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Date Created: 01/18/15
1 16 1 5 1 Goals A Relate realistic orbital speeds distances and period of the planets B Identify key observations of Galileo s that supported Copernican Cosmology II Tycho Brahe 15491601 A He realized Ptolemy s systems was two days off B Saw a supernova causing a new star C created an observer on a private island in his private castle D Uranitory the castle has huge star protractors to gure out where stars and planets were 20 years of this data 111 Brahe s GeoHeliocentric System A All planets went around the sun but the sun went around the Earth B Contribution was reams of data IV Johannes Kepler 15711630 A Super math genius but he was poor Then he got a scholarship to go to school B Kepler likes Copemicus s system so Brahe withheld his data from him C Figures out 2 important rules after trying so many different models 1 he had to let go of the idea of perfect geometry V Kepler s Laws A 1 The orbit of each planet around the sun is an ellipse with the sun at one focus 1 moving two foci apart to make ellipse atter 2 not perfect circle B 2as a planet moves around on its orbit it sweeps out equal areas in equal times 1 individual planet moves at different speeds will move faster when closer to the sun C 3 The more distant planets orbit the sun at slower speeds especially 1 p2 a3 2 a equals one AU 3 p is the planet s period in years and is it s average distance from the sun in AU 4 made of ellipse to edge almost a radius VI Galileo Galilei 15641642 A pendulums take the same amount of time to swing every swing B first scientists to use the telescope for studying and research C The Sidereal Message 1 he discovered mountains on the moon 2 the line of light or shadow on the moon is called The Terminator 3 the world did not eXpect mountain ranges they thought the moon was smooth Individual Stars 1 Studied Jupiter and found its moons 2 gured out that four things the moons are circling Jupiter 3 the closest goes the fastest Discovered Sun s Rotations 1 30 days Discovered that Saturn has ears 1 published a code to prove he was the rst to discover this Figured out new physics to prove that the Earth can spin Church mad at Galileo because it contradicted the bible but Galileo didn t care 1 he was put on house arrest