Sandage, Allan Rex

Sandage, Allan Rex

▪ American astronomer
born June 18, 1926, Iowa City, Iowa, U.S.

      U.S. astronomer who discovered the first quasi-stellar radio source (quasar), a starlike object that is a strong emitter of radio waves. He made the discovery in collaboration with the U.S. radio astronomer Thomas A. Matthews.

      Sandage became a member of the staff of the Hale Observatories (now the Mount Wilson and Palomar Observatories), in California, in 1952 and carried out most of his investigations there. Pursuing the theoretical work of several astronomers on the evolution of stars, Sandage, with Harold L. Johnson, demonstrated in the early 1950s that the observed characteristics of the light and colour of the brightest stars in various globular clusters indicate that the clusters can be arranged in order according to their age. This information provided insight into stellar evolution and galactic structure.

      Later, Sandage became a leader in the study of quasi-stellar radio sources, comparing accurate positions of radio sources with photographic sky maps and then using a large optical telescope to find a visual starlike source at the point where the strong radio waves are being emitted. Sandage and Matthews identified the first of many such objects in 1961. Sandage later discovered that some of the remote, starlike objects with similar characteristics are not radio sources. He also found that the light from a number of the sources varies rapidly and irregularly in intensity.

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Universalium. 2010.

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  • Sandage , Allan Rex — (1926–) American astronomer Born in Iowa City, Sandage graduated from the University of Illinois in 1948 and obtained his PhD in 1953 from the California Institute of Technology. He was on the staff of the Hale Observatories at Mount Wilson and… …   Scientists

  • Allan Rex Sandage — Nombre Allan Rex Sandage Nacimiento 18 …   Wikipedia Español

  • Allan Rex Sandage — Allan Sandage Astéroïde découvert : 1 (96155) 1973 HA 27 avril 1973 Allan Rex Sandage (né le 18 juin 1926 à Iowa City dans l Iowa) est un astronome américain. Il fut diplômé de l université de l Illinois en 1948. En 1953, il obtint son Ph.D …   Wikipédia en Français

  • Allan Rex Sandage — (* 18. Juni 1926 in Iowa City, Iowa; † 13. November 2010 in San Gabriel, Kalifornien[1]) war ein US amerikanischer Astronom. Inhaltsverzeichnis 1 Leben und Karriere 2 Ehrungen …   Deutsch Wikipedia

  • Allan Sandage — Allan Rex Sandage (* 18. Juni 1926 in Iowa City, Iowa) ist ein US amerikanischer Astronom. Sandage studierte an der University of Illinois und am California Institute of Technology wo er sich ab 1949 als Student von Walter Baade mit… …   Deutsch Wikipedia

  • Sandage — Allan Rex Sandage (* 18. Juni 1926 in Iowa City, Iowa) ist ein US amerikanischer Astronom. Sandage studierte an der University of Illinois und am California Institute of Technology wo er sich ab 1949 als Student von Walter Baade mit… …   Deutsch Wikipedia

  • Allan Sandage — Allan Rex Sandage, né le 18 juin 1926 à Iowa City, Iowa (États Unis), et mort à San Gabriel (Californie) le 13 novembre 2010 d un cancer du pancréas[1], est un astronome américain. Sommaire 1 Biographie …   Wikipédia en Français

  • Allan Sandage — Infobox Scientist name = Allan Sandage box width = image width =150px caption = Allan Sandage birth date = June 18 1926 birth place = Iowa City, Iowa death date = death place = residence = citizenship = nationality = American ethnicity = field =… …   Wikipedia

  • galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

  • Brucemedaille — Die Catherine Wolfe Bruce gold medal oder kurz Bruce Medal ist eine jährliche Auszeichnung durch die Astronomical Society of the Pacific für herausragende Lebensleistungen für die Astronomie, gestiftet von der namensgebenden US amerikanischen… …   Deutsch Wikipedia

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