Slide 17: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s
![[Needham radio telescope plaque]](ewen_50sand60s_slide17.jpg)
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Modified on by Ellen BoutonSlide 17: Two Roads that Crossed in the Wood - Growth of US Radio Astronomy in the 1950s and 1960s
Radiometric antenna boresighting with celestial radio sources. Credit: Photo courtesy of Doc Ewen.
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