Thursday, November 25, 2010

PTOLEMY

PTOLEMY 

-Born 90 AD and died 168 AD

-Astronomer, Mathematician, Geo


-claimed to have derived his geometrical models from selected astronomical observations by his predecessors spanning more than 800 years (though astronomers have for centuries suspected that his models' parameters were adopted independently of observations)

-created the aAmagest which contains a star catalog and lists forty-eight constellation

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