American astronomer (1909-2002) who studied under Donald H. Menzel and Fred L. Whipple at Harvard, developed a new spectrograph and a wide-field camera with Louis G. Henyey, and was director of the astronomy program at Caltech. He also did important work determining the abundances of elements in the stars and recognized quasars as compact, distant sources as bright as a galaxy. Collection of correspondence between Jesse L. Greenstein and Cambridge astronomer Arthur Beer, comprising eight letters by Greenstein (seven TLSs and one ALS), along with thirteen of Beer's retained carbon copies and drafts, dating from 1953-1959. In the letters, they discuss arrangements for visits and lectures, illustrations for Beer's publication entitled "Vistas in Astronomy," potential articles on astronomical spectrophotometry, and a collaboration with Leverett Davis, Jr. In overall fine condition.
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