Pol F. Swings (24 September 1906 – 28 October 1983) was a Belgian astrophysicist who was known for his studies of the composition and structure of stars and comets. He used spectroscopy to identify the elements in astronomical bodies, and, in particular, comets. Swings studied at the

University of Liège The University of Liège (french: Université de Liège), or ULiège, is a major public university of the French Community of Belgium based in Liège, Wallonia, Belgium. Its official language is French. As of 2020, ULiège is ranked in the 301 ...

, where he was professor of spectroscopy and astrophysics from 1932 to 1975. He was also a visiting professor at the

University of Chicago The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private university, private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park, Chicago, Hyde Park neighborhood. The University of Chic ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

(1939–43, 1946–52). From his study of cometary atmospheres, he is credited with the discovery of the Swings bands and the Swings effect. Swings bands are emission lines resulting from the presence of certain atoms of carbon; the Swings effect was discovered with the aid of a slit spectrograph and is attributed to

fluorescence Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore a lower photon energy, tha ...

resulting partly from solar radiation. Moreover, Swings studied spectroscopy of interstellar space and investigated the rotation of stars, as well as nebulae, novae, and variable stars. Pol Swings was awarded the

Francqui Prize The Francqui Prize is a prestigious Belgian scholarly and scientific prize named after Émile Francqui. Normally annually since 1933, the Francqui Foundation awards it in recognition of the achievements of a scholar or scientist, who at the start ...

for Exact Sciences in 1948. He was elected to the

American Academy of Arts and Sciences The American Academy of Arts and Sciences (abbreviation: AAA&S) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, a ...

in 1965, and the

American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organization that promotes knowledge in the sciences and humanities through research, professional meetings, publications, library resources, and communit ...

and the United States National Academy of Sciences in 1966. In 1981, Swings became a founding member of the

World Cultural Council The World Cultural Council is an international organization whose goals are to promote cultural values, goodwill and philanthropy among individuals. The organization founded in 1981 and based in Mexico, has held a yearly award ceremony since 198 ...

. 1637 Swings, an asteroid of the

Main belt The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies, of many sizes, but much smaller than planets, called ...

is named after him.

References

{{DEFAULTSORT:Swings, Pol 1906 births 1983 deaths Scientists from Charleroi 20th-century Belgian astronomers University of Liège alumni Academic staff of the University of Liège Founding members of the World Cultural Council Foreign associates of the National Academy of Sciences Presidents of the International Astronomical Union Members of the American Philosophical Society University of Chicago faculty