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|Keith Devlin (Devlin's Angle)|
|The theft of a first edition copy of Nicolaus Copernicus's classic text De revolutionibus orbium coelestium ("On the revolution of the heavenly spheres") was the seventh such disappearance of this valuable work in recent years - a chain of thefts that has left police from the United States to the former Soviet Union doing what the missing texts say the planets do around the sun: going round in circles. For De revolutionibus, as it is more commonly known, was the book in which Copernicus first presented the heliocentric model of the solar system. It is arguably the first scientific text of the modern scientific era...|
|Levels:||High School (9-12), College|
|Math Topics:||History and Biography, Astronomy|
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