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- Bessel was the first scientist who realized the effect later called personal equation, that several simultaneously observing persons determine slightly different values, especially recording the transit time of stars.
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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.
Jun 27, 2018 · The German astronomer Friedrich Wilhelm Bessel (1784-1846) established the modern ideals and standards of precision in astronomy and obtained the first measurement of the distance to a star. Friedrich Wilhelm Bessel was born in Minden, North Rhine-Westphalia, on July 22, 1784.
May 10, 2023 · Early researches by Friedrich Wilhelm Bessel (1784–1846) in Königsberg and Adolf Hirsch led to the development of a highly precise chronoscope by Mathias Hipp that, in turn, was based on a design by Charles Wheatstone for a device that measured the speed of artillery shells (Edgell & Symes, 1906).
Constant differences: Friedrich Wilhelm Bessel, the concept of the observer in early nineteenth-century practical astronomy and the history of the personal equation. Published online by Cambridge University Press: 02 May 2007. CHRISTOPH HOFFMANN.
- Christoph Hoffmann
- 2007
Nov 1, 2018 · Bessel also discovered the so called “Personal Equation,” the effect of the observer’s personality and circumstances on the science of astrometry. And he was one of the first to identify the systematic errors that derive from using scientific instruments.
Friedrich Bessel (1784-1846) ... the science of experimental psychology” (Duncombe, 1945, p. 13). Similarly, a tragic train crash in Sweden (see Fig. 7.5) led to ...
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