Drilling Bolt Holes on the 140 Foot Telescope

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Drilling Bolt Holes on the 140 Foot Telescope

The equatorial ring of the 140-foot (43-meter) telescope is a section of a 42-foot diameter circle. Its bronze gear was assembled from 28 separate segments that had to be accurately attached to the 3-million pound yoke. In this photo, engineers guide the massive drill into the equatorial ring of the 140-foot telescope in order to create the bolt holes.

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.
	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.