Doc Ewen

Doc Ewen: The Horn, HI, and Other Events in US Radio Astronomy

by Doc Ewen, © 2003


Slide 12: Detecting the Interstellar Hydrogen Line, 1951

[Horn antenna]

My November 1949 sketch of the horn antenna on the fourth floor parapet of Harvard's Lyman Laboratory. [Photo courtesy of Doc Ewen]

Slide 13
Modified on by Ellen Bouton