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41. Perseus Digital Library Welcome to Perseus 4.0, also known as the Perseus Hopper. Read more on the Perseus version history. New to Perseus? Click here for a short tutorial. http://www.perseus.tufts.edu/hopper?redirect=true |
42. Aristarchus Of Samos, The Heliocentric Model, The Seven-Day Week The definition of a planet has changed over the course of millennia, and during the last 100 years. In the 1820s, astronomers listed eleven planets Mercury, Venus, Earth, Mars http://factoidz.com/aristarchus-of-samos-the-heliocentric-model-the-sevenday-wee |
43. Aristarchus Of Samos Aristarchus of Samos (c. 320– c. 250 BC) Greek astronomer. The first to argue that the Earth moves around the Sun, he was ridiculed for his beliefs. http://encyclopedia.farlex.com/Aristarchos of Samos |
44. Aristarchus Of Samos Reviews On RateItAll Browse consumer ratings, consumer reviews, and consumer opinions of Aristarchus of Samos on RateItAll.com. Aristarchus of Samos is ranked on a list of Most Important People in http://www.rateitall.com/i-869117-aristarchus-of-samos.aspx |
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