Date: 2014-11-12 13:35:22Unmanned spacecraft Retroreflector Satellite Smithsonian Astrophysical Observatory Goddard Space Flight Center Fred Lawrence Whipple Moon Orbiter SELENE Spaceflight Spacecraft Space | | Optical observations of artificial Earth satellites by the Smithsonian Astrophysical Observatory grew from a concept in the mind of Dr, Fred Whipple, which he expounded sixty years ago at a gathering of artificial satellAdd to Reading ListSource URL: cddis.gsfc.nasa.govDownload Document from Source Website File Size: 96,44 KBShare Document on Facebook
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