20090704

Found physics: Kepler's first law

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http://www.flickr.com/photos/waiferx/3673336702/
Originally uploaded by Waifer X

Construction of an ellipse using pencil, string, and two thumbtacks, demonstrating Kepler's first law of planetary motion, where the Sun would be located at one of the thumbtacks (i.e., at one of the two foci). Video by Cuesta College Physical Sciences Division instructor Dr. Patrick M. Len.

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