Qualla: Green Bank Observatory

Green Bank Observatory: Introduction

Sun, 31 May 2026 00:00:00 GMT

Photo credit Z22, CC BY-SA 4.0. In 1960, an astronomer named Frank Drake pointed an 85-foot dish at two nearby sun-like stars and listened for radio signals that might have been broadcast by another intelligence. He called the experiment Project Ozma, after the Princess in Frank Baum's Oz books, and he conducted it from a remote mountain valley in West Virginia where the surrounding ridges shielded the dish from local radio noise. Ozma did not find anything, but it founded the modern search for extraterrestrial intelligence. More than six decades later, the same valley is still doing radio astronomy, on a vastly larger scale - and is still protected by ridges, plus a federal radio quiet zone that covers 13,000 square miles.

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Image: Z22 | CC BY-SA 4.0

Green Bank Observatory: Why Here

Sun, 31 May 2026 00:00:00 GMT

Photo credit Jarek Tuszyński, CC BY-SA 3.0. Green Bank, West Virginia, sits in a high valley in Pocahontas County, screened on every side by the Allegheny Mountains. When the National Radio Astronomy Observatory was founded in 1956, planners chose this valley specifically because the mountains blocked terrestrial radio noi...

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Image: Jarek Tuszyński | CC BY-SA 3.0

Green Bank Observatory: The Largest Steerable Telescope on Earth

Sun, 31 May 2026 00:00:00 GMT

Photo credit Jet Propulsion Laboratory, Public domain. The Robert C. Byrd Green Bank Telescope, completed in 2001 and named for the West Virginia senator who championed its funding, is the world's largest fully steerable radio telescope. Its dish measures 100 by 110 meters - more than two football fields wide. It can be pointed at an...

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Image: Jet Propulsion Laboratory | Public domain

Green Bank Observatory: Project Ozma and the Tatel Telescope

Sun, 31 May 2026 00:00:00 GMT

Photo credit Jarek Tuszyński, CC BY-SA 3.0. Before the Byrd telescope, before the 300-footer, there was the Howard E. Tatel Radio Telescope - an 85-foot dish completed in 1959. Frank Drake used the Tatel in April 1960 for Project Ozma, the first systematic search for extraterrestrial intelligence using a radio telescope. H...

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Image: Jarek Tuszyński | CC BY-SA 3.0

Green Bank Observatory: Independence from NSF

Sun, 31 May 2026 00:00:00 GMT

Photo credit Jarek Tuszyński, CC BY-SA 3.0. For decades, Green Bank was operated as part of the National Radio Astronomy Observatory under contract with the National Science Foundation. In 2012, NSF recommended fully divesting from Green Bank by October 1, 2016, as part of a broader effort to direct scarce federal astronom...

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Image: Jarek Tuszyński | CC BY-SA 3.0

Green Bank Observatory: A Place of Curious Pilgrimages

Sun, 31 May 2026 00:00:00 GMT

Photo credit Jarek Tuszyński, CC BY-SA 3.0. Green Bank attracts an unusual mix of visitors. Astronomers come for telescope time. Tourists come for the on-site Science Center, which offers tours of the campus and views of the dishes. People who suffer from electromagnetic hypersensitivity - a controversial condition in whic...

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Image: Jarek Tuszyński | CC BY-SA 3.0