Friedrich Wilhelm Bessel

Friedrich Wilhelm Bessel
C. A. Jensen, Friedrich Wilhelm Bessel, 1839 (Ny Carlsberg Glyptotek)
Born(1784-07-22)22 July 1784
Died17 March 1846(1846-03-17) (aged 61)
Königsberg, Kingdom of Prussia
NationalityGerman
Known forBessel functions
Bessel ellipsoid
Bessel polynomials
Besselian elements
Bessel's correction
Bessel's inequality
Repsold–Bessel pendulum
AwardsPhD (Hon)
University of Göttingen (1811)
Lalande Prize (1811), (1816)
Gold Medal of the Royal Astronomical Society (1829 and 1841)
Scientific career
FieldsAstronomy, mathematics, geodesy
InstitutionsUniversity of Königsberg
Doctoral studentsFriedrich Wilhelm Argelander Heinrich Scherk

Friedrich Wilhelm Bessel (German: [ˈbɛsl̩]; 22 July 1784 – 17 March 1846) 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.