\"Belgian Astrophysicist\" Pol Swings Hand Signed FDC Dated 1963 COA For Sale

Up for sale\"Belgian Astrophysicist\" Pol Swings Hand Signed First Day Cover Dated 1963.This item is certified authentic by ToddMueller Autographs and comes with their Certificate ofAuthenticity.
ES-7272E
Pol F. Swings(24 September 1906 – 28 October 1983) was a Belgianastrophysicistwho was known for his studies of the composition and structure of stars and comets. He usedspectroscopyto identify the elements in astronomical bodies, and, in particular, comets. Swings studied at theUniversity of Liège, where he was professor of spectroscopy and astrophysics from 1932 to 1975. He was also a visiting professor at theUniversity of Chicagoin theUnited States(1939–43, 1946–52). From his study of cometary atmospheres, he is credited with the discovery of theSwings bandsand theSwings effect. Swings bands are emissionlinesresulting from the presence of certain atoms of carbon; the Swings effect was discovered with the aid of a slit spectrograph and is attributed tofluorescenceresulting partly from solar radiation. Moreover, Swings studiedspectroscopyof interstellar space and investigated the rotation of stars, as well as nebulae, novae, and variable stars. Pol Swings was awarded theFrancqui Prizefor Exact Sciences in 1948. In 1981, Swings became a founding member of theWorld Cultural Council.1637 Swings, anasteroidof theMain beltis named after him.