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1900–92, Dutch astronomer, who confirmed (1927) and developed the theory of galactic rotation. He was the first to propose (1950) the existence of a mass of comets orbiting the sun far beyond the orbit of Pluto (the
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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The Dutch scholars, Kuenen and
, believe that he wrote none.
John E. Remsburg
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