Johann Gottfried Galle

Johann Gottfried Galle (June 9, 1812 in Radis, Saxony-Anhalt – July 10, 1910 in Potsdam, Brandenburg) was a German astronomer at the Berlin Observatory who, 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 (September 23, 1846). He used the calculations of Urbain Le Verrier to know where to look. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... June 9 is the 160th day of the year in the Gregorian calendar (161st in leap years), with 205 days remaining. ... For the overture by Tchaikovsky, see 1812 Overture; For the wars, see War of 1812 (USA - United Kingdom) or Patriotic War of 1812 (France - Russia) For the Siberia Airlines plane crashed over the Black Sea on October 4, 2001, see Siberia Airlines Flight 1812 1812 was a leap year starting... Radis is a community in Wittenberg district in Saxony-Anhalt, Germany. ... With an area of 20,447 km² and a population of 2. ... July 10 is the 191st day of the year (192nd in leap years) in the Gregorian calendar. ... 1910 (MCMX) was a common year starting on Saturday (link will display calendar) of the Gregorian calendar or a common year starting on Sunday of the 13-day slower Julian calendar. ... Potsdam is the capital city of the federal state of Brandenburg in Germany. ...   (Lower Sorbian: Bramborska; Upper Sorbian: Braniborska) is one of Germanys sixteen Bundesländer (federal states). ... An astronomer or astrophysicist is a person whose area of interest is astronomy or astrophysics. ... The Berlin Observatory has its origins in 1700 when Gottfried Leibniz initiated the Brandenburgische Society which would later become Prussian Academy of Sciences. ... Heinrich Louis dArrest (July 13, 1822 – June 14, 1875) was a Prussian astronomer, born in Berlin. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... September 23 is the 266th day of the year (267th in leap years). ... 1846 was a common year starting on Thursday (see link for calendar). ... Urbain Le Verrier. ...

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 (now Wrocław) to become professor of astronomy and the director of the local observatory. Johann Franz Encke (23 September 1791 – 26 August 1865) was a German astronomer, born in Hamburg. ... Wrocław. ... WrocÅ‚aw ( ; German: ; Czech: ; Latin: Wratislavia or Vratislavia) is the capital of Lower Silesia in southwestern Poland, situated on the Oder River (Odra). ...

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 December 2, 1839 to March 6, 1840. Comet Hale-Bopp Comet West For other uses, see Comet (disambiguation). ... December 2 is the 336th day of the year (337th in leap years) in the Gregorian calendar. ... 1839 (MDCCCXXXIX) was a common year starting on Tuesday (see link for calendar). ... March 6 is the 65th day of the year (66th in leap years) in the Gregorian calendar. ... 1840 is a leap year starting on Wednesday (link will take you to calendar). ...

Craters on the Moon and Mars, and a ring of Neptune, were named in his honor. Tycho crater on Earths moon. ... Apparent magnitude: up to -12. ... For the crater on the moon, see Galle (lunar crater). ... This is a list of the named rings and ring arcs of Neptune. ...

First Neptune observation

Galle's Ph.D. thesis finished in 1845 was a reduction and critical discussion of Ole Rømer's observation of meridian transits of stars and planets on the days from October 20 to October 23, 1706. Around 1845 he sent a copy of his thesis to Urbain Le Verrier, but only received an answer a year later on September 18, 1846. It reached Galle on September 23 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 Uranus. The same night, after Encke gave him the permission against his own judgement, an object fitting the description was found, and it was confirmed as being a planet over the next two evenings. 1845 was a common year starting on Wednesday (see link for calendar). ... Ole Rømer. ... This article is about the astronomical concept. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... The eight planets and three dwarf planets of the Solar System. ... October 20 is the 293rd day of the year (294th in leap years) in the Gregorian calendar. ... October 23 is the 296th day of the year (297th in leap years) in the Gregorian calendar. ... Events March 27 - Concluding that Emperor Iyasus I of Ethiopia had abdicated by retiring to a monastery, a council of high officials appoint Tekle Haymanot I Emperor of Ethiopia May 23 - Battle of Ramillies September 7 - The Battle of Turin in the War of Spanish Succession - forces of Austria and... 1845 was a common year starting on Wednesday (see link for calendar). ... September 18 is the 261st day of the year (262nd in leap years). ... 1846 was a common year starting on Thursday (see link for calendar). ... September 23 is the 266th day of the year (267th in leap years). ...

External links

Obituaries

• AN 185 (1910) 309/310 (in German)
• JRASC 4 (1910) 379
• MNRAS 71 (1911) 275
• Obs 33 (1910) 314

Astronomic Images

NASA photo of marscrater Galle (a.k.a. "Happy Face Crater")