Doc Ewen

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

by Doc Ewen, © 2003


Slide 34: Detecting the Interstellar Hydrogen Line, 1951

[Ewen and Purcell]

The horn antenna today, outside NRAO's Jansky Laboratory in Green Bank, WV. [Photo courtesy of Andrew Clegg]

Modified on by Ellen Bouton