Harmony of the Worlds
Harmony of the Worlds PHY 11030-011
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This 1 page Class Notes was uploaded by Amy Turk on Friday May 20, 2016. The Class Notes belongs to PHY 11030-011 at Kent State University taught by Dr. Jonathan Secaur in Spring 2016. Since its upload, it has received 18 views. For similar materials see 7 Ideas That Shook The Universe in Physics 2 at Kent State University.
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Date Created: 05/20/16
Harmony of the Worlds cosmos video ● astrologers see the world as affecting human character and fate ● astrology = which constellation the planets are in at the moment of your birth strongly influences your future ○ survived and flourished = pretends to satisfy our longings ● stars always rise in the east and always set in the west ● people went to great measures to practice astronomy = literally a matter of life and death to be able to predict the seasons ● planets = greek word for “little wonders” ○ the planets are worlds and go around the sun according to mathematical laws ● ptolemy believed that the earth was at the center of the universe and everything went around the earth ○ supported by the church through the dark ages = prevented the advancement of astronomy for 1500 years ● copernicus = the sun was at the center ○ annoyed a lot of people ● keppler = “geometry is God himself” ○ taught high school math in Austria ■ not a good teacher ● the orbit is an ellipse ○ the sun is not at the center ■ the planet goes slower when its farther away from the sun and speeds up when its closer ■ the planet is falling towards the sun without ever reaching it ● “the planet moves in an ellipse with the sun at one focus” = Kepler's 1st law ● 2nd law = the planet sweeps out equal areas in equal time ● 3rd law = there’s a force from the sun that drives the planets ○ stronger for inner, fast moving planets and weaker for outer, slow moving planets ○ Isaac Newton later identified the force as gravity ● Kepler discovered how the planets move and how the solar system works
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