Heinrich Wilhelm Matthias Olbers was a German astronomer. He found a convenient method of calculating the orbit of comets, and in 1802 and 1807, discovered the second and the fourth asteroids Pallas a
Lithograph by Rudolph Suhrlandt
Olbers monument in Bremen by Carl Johann Steinhäuser (1850)
Abhandlung über die leichteste und bequemste Methode die Bahn eines Cometen zu berechnen, 1797
Friedrich Wilhelm Bessel
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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 t
Heinrich Wilhelm Matthias Olbers
…in 1826), states that the darkness of the night sky conflicts with the supposition of an infinite and eternal static universe. In July 1804, the young Friedrich Wilhelm Bessel contacted Olbers to get his opinion of Bessel's treatise on orbit calculation of Halley's Comet. Olbers noticed the outstanding quality of this work…
C. A. Jensen, Friedrich Wilhelm Bessel, 1839 (Ny Carlsberg Glyptotek)
Königsberg Observatory (1830)
Bessel's geodetic apparatus, in the museum of Istituto Geografico Militare, Florence, Italy
Tabulae Regiomontanae reductionum observationum astronomicarum ab anno 1750 usque ad annum 1850 computatae, 1830