Prime Focus of the 140-foot

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Prime Focus of the 140-foot

Original ring feed of the 140-foot telescope

Sitting 60 feet above the dish of the 140-foot telescope was this original feed ring. Radio waves bouncing from the 43-meter parabolic dish came to a focus directly where the receiver would have been placed, inside the black cartridge of this ring.

Credit: NRAO/AUI/NSF

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The National Radio Astronomy Observatory is a facility of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
	Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.
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Prime Focus of the 140-foot

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