File:Green Banks - Ewen-Purcell Horn Antenna.jpg

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    English: Horn antena used by Harold L. Ewen and Edward M. Purcell at the Lyman Laboratory of Physics at Harvard University in 1951 for the first detection of radio radiation from nuclear atomic hydrogen gas in the milky Way at a wevelength of 21 centimeters. Now at National Radio Astronomy Observatory in Green Bank, West Virginia.
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    Source Own work
    Author Jarek Tuszyński
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    Camera location38° 25′ 53.55″ N, 79° 49′ 04.61″ W  Heading=270° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
    Jarek Tuszyński, the copyright holder of this work, hereby publishes it under the following licenses:
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    This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
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    Jarek Tuszyński / CC-BY-SA-3.0 & GDFL
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    38°25'53.555"N, 79°49'4.613"W

    heading: 270.00 degree

    6 September 2009

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    current05:51, 26 September 2009Thumbnail for version as of 05:51, 26 September 20092,592 × 3,872 (3.88 MB)wikimediacommons>Jarekt{{Information |Description={{en|1= Horn antena used by Harold L. Ewen and Edward M. Purcell at thhe Lyman Laboratory of Physics at Hardward University in 1951 for the first detection of radio radiation from nuclear atomic hydrogen gas in the milky way at

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