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	Podcast:		Astronomy 161 - Introduction to Solar System Astronomy
	Episode:		Lecture 19: Orbits
	Category:		Education
	Duration:		00:00:00
	Publish Date:		2006-10-17 11:43:29
	Description:		Why do Kepler's Laws work? This lecture discusses how Newton applied his Three Laws of Motion and the Law of Universal Gravitation to the problem of orbits. Newton generalized Kepler's laws to apply to any two massive bodies orbiting around their common center of mass. We discuss these new, generalized laws of orbital motion, introducing the families of open and closed orbits, circular and escape velocity, center-of-mass, conservation of angular momentum, and how orbital mechanics is used to measure the masses of astronomical objects. Recorded 2006 Oct 17 in 100 Stillman Hall on the Columbus campus of The Ohio State University.
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