On the BUS

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On the BUS

Engineers maintaining the GBT's backup structure

Telescope technicians carefully balance on the maintenance trusses to work on the Green Bank Telescope’s backup structure (BUS). The GBT’s 2.3-acre dish is supported by 7,652 pieces of steel welded and joined together in the complex framework. The BUS weighs around 2.3 million pounds. Keeping it strong and sound requires constant vigilance.

Credit: NRAO/AUI/NSF

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On the BUS

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The National Radio Astronomy Observatory is a facility of the 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 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.