Friedrich Wilhelm August Argelander

Friedrich Wilhelm August Argelander (March 22, 1799 – February 17, 1875) was a Prussian astronomer. Image File history File links Argelander. ... Image File history File links Argelander. ... March 22 is the 81st day of the year in the Gregorian Calendar (82nd in leap years). ... 1799 was a common year starting on Tuesday (see link for calendar). ... February 17 is the 48th day of the year in the Gregorian calendar. ... 1875 (MDCCCLXXV) was a common year starting on Friday (see link for calendar). ... Coat of Arms of the Kingdom of Prussia, 1701-1918 Prussia (German: ; Latin: Borussia, Prutenia; Lithuanian: ; Polish: ; Old Prussian: PrÅ«sa) was, most recently, a historic state originating in East Prussia, an area which for centuries had substantial influence on German and European history. ... An astronomer or astrophysicist is a person whose area of interest is astronomy or astrophysics. ...

He was born in Memel in the Kingdom of Prussia (now Klaipėda in Lithuania), the son of a German father and Finnish mother. He studied with Friedrich Bessel, and obtained his Ph.D. in 1822 at Königsberg. The title given to this article is incorrect due to technical limitations. ... Flag of Prussia (1894 - 1918) The Kingdom of Prussia existed from 1701 until 1918, and from 1871 was the leading kingdom of the German Empire, comprising in its last form almost two-thirds of the area of the Empire. ... Country Lithuania Region Lithuania minor County KlaipÄ—da County Municipality KlaipÄ—da city municipality Mayor Rimantas TaraÅ¡kevičius Coordinates Capital of KlaipÄ—da County KlaipÄ—da city municipality Population 187,316 in 2006 (3nd)} Density 1926/km² Area 98 km² First mentioned 1252 Granted city rights 1254 or 1258... Friedrich Wilhelm Bessel (July 22, 1784 – March 17, 1846) was a German mathematician, astronomer, and systematizer of the Bessel functions (which, despite their name, were discovered by Daniel Bernoulli). ... Doctor of Philosophy (Ph. ... 1822 (MDCCCXXII) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Thursday of the 12-day-slower Julian calendar). ... Former German name of the city of Kaliningrad. ...

From 1823 until 1837 he was the head of the Finnish observatory at Turku then at Helsinki. He then moved to Bonn, Germany. Here he developed a friendship with King Frederick William IV, who funded a new observatory at Bonn. There he became known for his work in recording the positions of stars. 1823 was a common year starting on Wednesday (see link for calendar). ... | Queen Victoria, Queen of the United Kingdom (1837 - 1901) 1837 was a common year starting on Sunday (see link for calendar). ... MolÄ—tai Astronomical Observatory An observatory is a location used for observing terrestrial and/or celestial events. ... Turku (IPA: , Swedish:  ), founded in the 13th century, is the oldest and fifth largest city in Finland, with a population of 174,868 (as of 2005). ... Founded 1550 Country Finland Province Southern Finland Region Uusimaa Sub-region Helsinki Area[1] - Of which land - Rank 185. ... Bonn is the 19th largest city in Germany, located about 20 kilometres south of Cologne on the river Rhine in the Federal State of North Rhine-Westphalia. ... Photograph of Frederick King Frederick William IV of Prussia (October 15, 1795 - January 2, 1861), the eldest son and successor of Frederick William III of Prussia, reigned as King of Prussia from 1840 to 1861. ... The Pleiades, an open cluster of stars in the constellation of Taurus. ...

Together with Adalbert Krüger and Eduard Schönfeld, he was responsible for the star catalogue known as the Bonner Durchmusterung, published between 1852 and 1859, which gave the positions and brightness of more than 324,000 stars, although it did not cover much of the southern half of the sky. This was the last star map to be published without the use of photography. Eduard Schönfeld (December 22, 1828 - May 1, 1891), German astronomer, was born at Hildburghausen, in the duchy of Meiningen. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... 1852 was a leap year starting on Thursday (see link for calendar). ... 1859 (MDCCCLIX) is a common year starting on Saturday of the Gregorian calendar (or a common year starting on Monday of the Julian calendar). ...

Argelander was the first astronomer to begin careful study of variable stars. Only a handful were known when he began, and he was responsible for introducing the modern system of identifying them. He also made a rough determination of the direction in which the Sun was moving. Most stars are of almost constant luminosity. ... The Sun is the star of our solar system. ...

In 1863 he founded an international organization of astronomers named the Astronomische Gesellschaft. He also won the Gold Medal of the Royal Astronomical Society the same year. 1863 (MDCCCLXIII) is a common year starting on Thursday of the Gregorian calendar (or a common year starting on Saturday of the Julian calendar). ... Gold Medal awarded to Asaph Hall The Gold Medal is the highest award of the Royal Astronomical Society. ...

In 2006, the three astronomical institutes of the Bonn University were merged and renamed as the Argelander-Institut für Astronomie. The Argelander crater on the Moon and the asteroid 1551 Argelander are named for him. 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... Argelander is a lunar impact crater that is located in the south-central highlands of the Moon. ... Bulk silicate composition (estimated wt%) SiO2 44. ... 253 Mathilde, a C-type asteroid. ...

References

• Asimov's Biographical Encyclopedia of Science and Technology, Isaac Asimov, Doubleday & Co., Inc., 1972, ISBN 0-385-17771-2. (Parts of this page are based on this biography.)

Isaac Asimov, Ph. ... See also: 1971 in literature, other events of 1972, 1973 in literature, list of years in literature. ...

External links

Obituaries

• MNRAS 36 (1876) 151