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Maintenance tower for the 140-foot telescope

The 140-foot telescope in Green Bank gets an upgrade as its prime focus is swallowed by the receiver tower. Inside the tower, an engineer is installing fiber optic control devices that allows the small reflecting mirror in the cage to be adjusted very precisely. This helps it to better aim its focused radio waves onto the receivers nestled in the middle of the 43-meter dish.

Credit: NRAO/AUI/NSF

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More Historical Radio Telescopes Images & Videos

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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.
	The U.S. National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."
	AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.