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October 25, 2011
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
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Asteroid 2005 YU55 observed by Arecibo Telescope--a National Science Foundation facility.
The near-Earth asteroid 2005 YU55 was observed from the Arecido Observatory with planetary radar on April 19, 2010, when the asteroid was about 1.5 million miles from Earth.
Credit: Arecibo Observatory/Michael Nolan
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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