File:Green Banks - Ewen-Purcell Horn Antenna info.jpg
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Summary
[edit]DescriptionGreen Banks - Ewen-Purcell Horn Antenna info.jpg |
English: Plaque next to Ewen-Purcell Horn Antenna now at National Radio Astronomy Observatory in Green Bank, West Virginia. Text of Plaque: This Horn antenna was 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 wavelength of 21 centimeters. |
Date | |
Source | Own work |
Author | Jarek Tuszyński |
Other versions |
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Camera location | 38° 25′ 53.55″ N, 79° 49′ 04.61″ W | View this and other nearby images on: OpenStreetMap | 38.431543; -79.817948 |
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Licensing
[edit]Jarek Tuszyński, the copyright holder of this work, hereby publishes it under the following licenses:
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Jarek Tuszyński / CC-BY-SA-3.0 & GDFL
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:47, 26 September 2009 | 3,665 × 2,455 (3.23 MB) | Jarekt (talk | contribs) | {{Information |Description={{en|1=Plaque next to Ewen-Purcell Horn Antenna now at National Radio Astronomy Observatory in Green Bank, West Virginia.Text of Plaque: '' This Horn ant |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D80 |
Exposure time | 1/125 sec (0.008) |
F-number | f/5.6 |
ISO speed rating | 280 |
Date and time of data generation | 15:34, 6 September 2009 |
Lens focal length | 70 mm |
Software used | Ver.1.00 |
File change date and time | 15:34, 6 September 2009 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 15:34, 6 September 2009 |
Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 4.9 APEX (f/5.46) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 20 |
DateTimeOriginal subseconds | 20 |
DateTimeDigitized subseconds | 20 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 105 mm |
Scene capture type | Landscape |
Contrast | Hard |
Saturation | Normal |
Sharpness | Hard |
Subject distance range | Unknown |