George Van Biesbroeck
|George Van Biesbroeck|
January 21, 1880|
|Died||February 23, 1974
|Nationality||Belgium - United States|
|Institutions||Yerkes Observatory, McDonald Observatory|
|Alma mater||Ghent University|
|Doctoral advisor||Karl Schwarzschild|
|Notable awards||James Craig Watson Medal (1957)|
George A. Van Biesbroeck (or Georges-Achille Van Biesbroeck, January 21, 1880 – February 23, 1974) was a Belgian-American astronomer. He worked at observatories in Belgium, Germany and the United States. He specialized in the observation of double stars, asteroids and comets. He is notable for his long career as an observational astronomer.
He was born in Ghent, Belgium on January 21, 1880 to a family of artists. At his father's request he pursued, and in 1902, he received, the 1st degree of Civil Engineering Construction and began work as a civil engineer for the Brussels Department of Roads and Bridges. But his true vocation is not there, it was astronomy, and while performing his official duties as a civil engineer he joined volunteers at the Uccle Observatory. In 1904 he left civil engineering behind and joined the staff at the Royal Observatory of Belgium at Uccle.
He then enrolled at Ghent University and obtained a degree in theoretical astronomy. He worked at the Heidelberg Observatory, then at the Potsdam Observatory under the direction of Max Wolf, Karl Schwarzschild and others.
In 1915, as World War I was raging, he was invited to come to work at Yerkes Observatory. He and his family made the dangerous trip across wartime Europe and settled permanently in the United States. He became a U.S citizen in 1922. He then began his work on double stars, comets, asteroids, and variable stars. In 1945 he was forced into retirement at Yerkes at the age of 65. Relieved of administrative duties, he became an even more active observer at Yerkes and at the McDonald Observatory. He made the frequent automobile trips between the observatories in Wisconsin and Texas without complaint.
He participated in numerous physically grueling astronomical expeditions to remote parts of the world throughout the late 1940s and 1950s. In 1952, at age 72, he traveled to Khartoum in Sudan and set up a 20' telescope to confirm Einstein's Theory of Relativity by noting the change in positions of the stars around the Sun during a total eclipse that year. His measurements were in agreement with Einstein's predictions. His travels to Sudan were the subject of a Time Magazine article.
He discovered the periodic comet 53P/Van Biesbroeck, as well as two non-periodic comets: C/1925 W1 (Van Biesbroeck 1) and C/1935 Q1 (Van Biesbroeck 2).
He also discovered sixteen asteroids.
|Asteroids discovered: 16|
|990 Yerkes||23 November 1922|
|993 Moultona||12 January 1923|
|1024 Hale||2 December 1923|
|1027 Aesculapia||11 November 1923|
|1033 Simona||4 September 1924|
|1045 Michela||19 November 1924|
|1046 Edwin||1 December 1924|
|1079 Mimosa||14 January 1927|
|1270 Datura||17 December 1930|
|1312 Vassar||27 July 1933|
|1464 Armisticia||11 November 1939|
|2253 Espinette||30 July 1932|
|2463 Sterpin||10 March 1934|
|3211 Louispharailda||10 February 1931|
|3378 Susanvictoria||25 November 1922|
|3641 Williams Bay||24 November 1922|
In 1961 he published the Van Biesbroeck's star catalog. In this he cataloged a number of very faint stars, known by the VB numbers he assigned to them upon discovery. One notable star he discovered was the very small red dwarf secondary star, VB 10, also known as Gliese (GJ) 752B, of the primary star, Wolf 1055 (Gliese (GJ) 752A). This star was unique in that its absolute magnitude of 19 was the lowest of any star then known and still thought to be the lowest possible for any star. VB 10 was given the designation of Van Briesbroeck's Star to honor him for this work and his work with double stars.
Later life and death
In 1963 he came to the Lunar and Planetary Laboratory of the University of Arizona in Tucson Arizona to work under Gerard Kuiper. There he used his practical skills as a land surveyor to site the new Catalina Station now under the direction of Steward Observatory and that now houses the 1.6m Kuiper Telescope. He continued to observe and make contributions to astronomy up to a few months before his death. New scientific papers continued to be published under his name for several years afterward. He died on February 23, 1974 at the age of 94.
Honors and awards
Throughout his long and productive life he received may honors. This is a partial list.
- Gold Medal of the Royal Danish Society of Sciences (1910)
- Donohe Comet Medal of the Astronomical Society of the Pacific (1926)
- Burr Prize from the National Geographic Society (1952)
- Price Valzer de l'Académie des Sciences Paris
- James Craig Watson Medal (1957)
Objects named for Van Biesbroeck
- The asteroid 1781 Van Biesbroeck.
- The crater Van Biesbroeck on the Moon
- The mountain Mount Van Biesbroeck near the McDonald Observatory
- The star Van Briesboeck's Star, VB 10, from his catalog
The George Van Biesbroeck Prize
The George Van Biesbroeck Prize, awarded by the American Astronomical Society, is named in his honor. The prize is a lifetime achievement award given to astronomers who have contributed long-term extraordinary or unselfish service to astronomy.
- "George A. Van Biesbroeck". Physics Today 27 (7): 59. July 1974. Bibcode:1974PhT....27g..59.. doi:10.1063/1.3128713.
- Muller, P. and Baize, P. (February 1974). "G. A. van Biesbroeck (1880 - 1974)". L'Astronomie. 88e. année: 305–308. Bibcode:1974LAstr..88Q.305M.
- Osterbrock D. E. Yerkes Observatory, 1892-1950: The Birth, near Death, and Resurrection of a Scientific Research Institution.. University of Chicago Press. p. 267.
- "Decision in Khartoum". Time Magazine. December 22, 1952.
- van Biesbroeck, G. (November 1961). "A search for Stars of Low Luminosity". Astronomical Journal 66 (7): 528–530. Bibcode:1961AJ.....66..528V. doi:10.1086/108457.
- Hardie, R. H. (August 1974). "Georges van Biesbroeck, 1880-1974". Journal of the Royal Astronomical Society of Canada 68 (4): 202. Bibcode:1974JRASC..68..202H.