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Before Telescopes A History of Astronomy series by John Dillon. Exploring what early astronomers learned without telescopes—just sharp eyes and sharp minds— is a good way to understand the basics of observational astronomy. RFO in Sugarloaf Ridge State Park Kenwood, (Sonoma County) CA www.rf... More


Added Jun 1, 2016  

Channel Science & Technology

Duration 90:50   |   views 253


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