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- He introduced corrected observations for the so-called personal equation, a statistical bias in measurement characteristic of the observer himself that must be eliminated before results can be considered reliable, and he made a systematic study of the causes of instrumental errors.
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Apr 17, 2024 · Friedrich Wilhelm Bessel, German astronomer whose measurements of positions for about 50,000 stars and rigorous methods of observation took astronomy to a new level of precision. He was the first to measure the parallax, and hence the distance, of a star other than the Sun. Learn more about Bessel’s life and work.
- The Editors of Encyclopaedia Britannica
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.
Jul 22, 2011 · Wilhelm Bessel determined the positions and proper motions of stars. He also used a method of mathematical analysis involving what is now known as the Bessel function.
Jan 1, 2006 · From another perspective, psychometrics had been founded in the early years of the 19th century by two astronomers, Friedrich Wilhelm Bessel and Carl Friedrich Gauss.
- Lyle V. Jones, David M Thissen
- 2006
From this starting point the paper develops two arguments. First, these involuntary differences subverted the concept of the ‘observing observer’. What had previously been defined as a reference point of trust and precision turned into a source of an error that resisted any wilful intervention.
- Christoph Hoffmann
- 2007
Nov 1, 2018 · Bessel started to work with the instrument, learning how best to calibrate it and performed a series of trial micrometer measurements of various celestial bodies, including the planets and some well-known binary star candidates.
Friedrich Bessel (1784-1846), an astronomer from Königsberg, was the first to realize that there was a discrepancy between observers and that it was involuntary.
