Karl Müller (22 August 1866 – 23 October 1942) was born in Franzensbad (Czech:

Františkovy Lázně Františkovy Lázně (; german: Franzensbad) is a spa town in Cheb District in the Karlovy Vary Region of the Czech Republic. It has about 5,200 inhabitants. Together with neighbouring Karlovy Vary and Mariánské Lázně, it is part of the West B ...

), Bohemia,

Austrian Empire The Austrian Empire (german: link=no, Kaiserthum Oesterreich, modern spelling , ) was a Central-Eastern European multinational great power from 1804 to 1867, created by proclamation out of the realms of the Habsburgs. During its existence ...

and died in

Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

. He was an

Austrian Austrian may refer to: * Austrians, someone from Austria or of Austrian descent ** Someone who is considered an Austrian citizen, see Austrian nationality law * Austrian German dialect * Something associated with the country Austria, for example: ...

government official and amateur

astronomer An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either ...

. He collaborated with

Mary Adela Blagg Mary Adela Blagg (17 May 1858 – 14 April 1944) was an English astronomer and was elected a fellow of the Royal Astronomical Society in 1916. Biography She was born in Cheadle, Staffordshire, and lived her entire life there. Mary was th ...

on standardizing the nomenclature of formations on the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

for the Lunar Commission of the newly formed

International Astronomical Union The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreac ...

. Together with Blagg he produced a two volume set in 1935, entitled ''Named Lunar Formations'', that became the standard reference on the subject. The crater Müller on the Moon is named after him.

Notes

{{DEFAULTSORT:Muller, Karl 1866 births 1942 deaths 20th-century astronomers Astronomers from Austria-Hungary