File:ALSEP AS15-85-11468.jpg

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English: Apollo 15's Lunar Ranging Retro Reflector (LRRR). Original Caption: 125:33:21 Dave took this cross-Sun from the south of the LRRR, showing the orientation gnomon and bubble level. The LRRR, reflects laser pulses back to the telescopes on Earth used to illuminate it. By measuring the two-way travel time between the telescope and the LRRR, experiments can determine the distance between the two to a few centimeters and address such issues as Einstein's Theory of General Relativity and the existence of a liquid lunar core. As of February 2005, the retroreflectors deployed on Apollos 11, 14, and 15 were still being used in conjunction with a dedicated facility at the MacDondald Observatory in Texas.
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This image or video was catalogued by NASA Headquarters of the United States National Aeronautics and Space Administration (NASA) under Photo ID: [https://www.hq.nasa.gov/alsj/a15/AS15-85-11468HR.jpg AS15-85-11468].

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Author Dave Scott, NASA
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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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The original description page was here. All following user names refer to en.wikipedia.
  • 2007-08-01 23:16 Andy120290 904×909× (187620 bytes) Apollo 15's LRRR. {{PD-USGov-NASA}}

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current23:38, 16 August 2010Thumbnail for version as of 23:38, 16 August 20102,340 × 2,353 (767 KB)wikimediacommons>Bubba73Higher resolution version

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