Franz Xaver von Zach
Astronomer
1754 – 1832
Who was Franz Xaver von Zach?
Baron Franz Xaver von Zach was a Hungarian astronomer born at Pest, Hungary. He studied physics in Pest, Hungary, and served for some time in the Austrian army. He taught at the University of Lemberg. He lived in Paris in 1780-83, and in London from 1783 to 1786 as tutor in the house of the Saxon ambassador, Hans Moritz von Brühl. In Paris and London he entered the circles of astronomers like Joseph de Lalande, Pierre-Simon Laplace and William Herschel. In 1786 he was appointed by Ernest II, Duke of Saxe-Gotha-Altenburg director of the new observatory on Seeberg hill at Gotha, which was finished in 1791. At the close of the 18th century, he organised the "Celestial Police", a group of twenty-four astronomers, to prepare for a systematic search for the "missing planet" predicted by the Titius-Bode law between Mars and Jupiter. Ceres was discovered by accident just as the search was getting underway. Using predictions made of the position of Ceres by Carl Friedrich Gauss, on 31 December 1801/1 January 1802, Zach recovered Ceres after it was lost during its passage behind the Sun.
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- Born
- Jun 16, 1754
Pest, Hungary - Nationality
- Germany
- Hungary
- Austria
- Profession
- Died
- Sep 2, 1832
Paris
Submitted
on July 23, 2013
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