Friedrich Wilhelm Bessel German Astronomer Physicist FDC Postcard

zx364  A rare limited edition first day cover from Germany of Friedrich Wilhelm Bessel with stunning artwork of this historic figure and the original stamp on its first day of releaswith commemorative hand frank for full authenticity (see scan) and with further details of Friedrich Wilhelm Bessel on reverse (in German language) unused and mint. 

_Friedrich Wilhelm Bessel was a German astronomer, mathematician, physicist, and geodesist. He was the first astronomer who determined reliable values for the distance from the sun to another star by the method of parallax. Certain important mathematical functions were named Bessel functions after Bessel's death, though they had originally been discovered by Daniel Bernoulli before being generalised by Bessel._

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