friedrich wilhelm bessel वाक्य
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- He withheld his results, however, because he suspected they were too large to be true, but eventually published them in 1839 after Friedrich Wilhelm Bessel released his own accurately determined parallax for 61 Cygni in 1838.
- The first successful published direct measurements of an object at interstellar distances were undertaken by German astronomer Friedrich Wilhelm Bessel in 1838, who used this approach to calculate the 3.5-parsec distance of 61 Cygni.
- He studied astronomy with Jean-Alfred Gautier and worked with Fran�ois Arago in Paris, Alexander von Humboldt and Johann Franz Encke in Berlin, Friedrich Wilhelm Bessel at the University of K�nigsberg and Carl Friedrich Gauss at the University of G�ttingen.
- Both components are orange-hued dwarf ( main sequence ) stars; the primary is of magnitude 5.2 and the secondary is of magnitude 6.1 . 61 Cygni is significant because Friedrich Wilhelm Bessel determined its parallax in 1838, the first star to have a known parallax.
- From May to August 1835 the K�nigsberg astronomer Friedrich Wilhelm Bessel carried out pendulum observations in the 3 little magnetic house3 ( Magnetisches H�uschen " ) in the grounds of the observatory ( see Freydanck's painting on this page ) for the creation of a new Prussian measurement of length.
- Early researches by Friedrich Wilhelm Bessel ( 1784 1846 ) in K�nigsberg and Adolf Hirsch led to the development of a highly precise chronoscope by Matth�us 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 ).
- In 1838, Friedrich Wilhelm Bessel measured its distance from Earth at about 10.3 light-years, very close to the actual value of about 11.4 light-years; this was the first distance estimate for any star other than the Sun, and first star to have its stellar parallax measured.
- Henderson did not immediately publish his results, however ( there had been previous, discredited attempts to claim a measurement of stellar parallax ), and eventually he was beaten to the punch by Friedrich Wilhelm Bessel, who published a parallax of 10.3 light years ( 9.6 % too small ) for 61 Cygni in 1838.
- In 1836, the German mathematician Friedrich Wilhelm Bessel, after observing streams of vapor during the appearance of Halley's Comet in 1835, proposed that the jet forces of evaporating material could be great enough to significantly alter a comet's orbit, and he argued that the non-gravitational movements of Encke's Comet resulted from this phenomenon.
- In 2011, she was elected Fellow of the American Physical Society; and she won a Friedrich Wilhelm Bessel Research Award from the Alexander von Humboldt Foundation for developing robust electronic structure methods for open-shell and electronically excited species, and creative use of " ab initio " theory to understand the chemistry of bimolecules, reaction intermediates, and photoinduced processes.
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