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'''Johann Gottfried Galle''' (9 June 1812 – 10 July 1910) was a German [[astronomer]] at the [[Berlin Observatory]] who, with the assistance of student [[Heinrich Louis d'Arrest]], was the [[Discovery of Neptune|first person to view the planet Neptune]], and know what he was looking at |
'''Johann Gottfried Galle''' (9 June 1812 – 10 July 1910) was a German [[astronomer]] at the [[Berlin Observatory]] who, on 23 September 1846, with the assistance of student [[Heinrich Louis d'Arrest]], was the [[Discovery of Neptune|first person to view the planet Neptune]], and know what he was looking at. He used the calculations of [[Urbain Le Verrier]] to know where to look. |
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Born in [[Radis]], Galle studied at the [[Humboldt University of Berlin|University of Berlin]] from 1830-33. He had started to work as an assistant to [[Johann Franz Encke]] in 1835 immediately following the completion of the Berlin observatory. In 1851 he moved to [[University of Wrocław|Breslau (today Wrocław)]] to become professor of astronomy and the director of the local observatory. |
Born in [[Radis]], Galle studied at the [[Humboldt University of Berlin|University of Berlin]] from 1830-33. He had started to work as an assistant to [[Johann Franz Encke]] in 1835 immediately following the completion of the Berlin observatory. In 1851 he moved to [[University of Wrocław|Breslau (today Wrocław)]] to become professor of astronomy and the director of the local observatory. |
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Revision as of 07:08, 30 October 2011
Johann Gottfried Galle | |
|---|---|
 Johann Gottfried Galle | |
| Born | June 9, 1812 Radis, Germany |
| Died | July 10, 1910 (aged 98) Potsdam, Germany |
| Nationality | German |
| Alma mater | University of Berlin |
| Known for | Discovery of Neptune |
| Scientific career | |
| Fields | astronomy |
| Institutions | Berlin Observatory University of Breslau |
| Signature | |
 | |
Johann Gottfried Galle (9 June 1812 – 10 July 1910) was a German astronomer at the Berlin Observatory who, on 23 September 1846, with the assistance of student Heinrich Louis d'Arrest, was the first person to view the planet Neptune, and know what he was looking at. He used the calculations of Urbain Le Verrier to know where to look.
Born in Radis, Galle studied at the University of Berlin from 1830-33. He had started to work as an assistant to Johann Franz Encke in 1835 immediately following the completion of the Berlin observatory. In 1851 he moved to Breslau (today Wrocław) to become professor of astronomy and the director of the local observatory.
Throughout his career he studied comets, and in 1894 (with the help of his son Andreas Galle) he published a list with 414 comets. He himself had previously discovered three comets in the short span from 2 December 1839 to 6 March 1840. He died in Potsdam at age 98.
Two craters, one on the Moon and the "happy face" one on Mars, the asteroid 2097 Galle, and a ring of Neptune have been named in his honor.
First Neptune observation
Galle's Ph.D. thesis, finished in the year of 1845, was a reduction and critical discussion of Ole Rømer's observation of meridian transits of stars and planets on the days from 20 October to 23 October 1706. Around 1845 he sent a copy of his thesis to Urbain Le Verrier, but only received an answer a year later on 18 September 1846. It reached Galle on 23 September and in it Le Verrier asked him to look at a certain region of sky to find a predicted new planet, which would explain the perturbations of the planet Uranus. The same night, after Encke gave him the permission against his own judgment, an object fitting the description was found, and it was confirmed as being a planet over the next two evenings.
External links
Obituaries
- Franz, J. (1910). "Anzeige des Todes von Johann Gottfried Galle". Astronomische Nachrichten. 185 (19): 309. Bibcode:1910AN....185..309F. doi:10.1002/asna.19101851906. Template:De icon
- Chant, C. A. (1910). "Johann Gottfried Galle". Journal of the Royal Astronomical Society of Canada. 4: 379. Bibcode:1910JRASC...4..379C.
- "Obituary Notices : Associates :- Galle, Johann Gottfried". Monthly Notices of the Royal Astronomical Society. 71: 275. 1911. Bibcode:1911MNRAS..71R.275.
- "Obituaries: G. V. Schiaparelli, J. G. Galle, J. B. N. Hennessey J. Coles, J. E. Gore". The Observatory. 33: 311. 1910. Bibcode:1910Obs....33..311.