On July 21, 1969, the first manned lunar mission, Apollo 11, placed the first retroreflector array on the Moon, enabling highly accurate measurements of the Earth-Moon separation via laser ranging.
Lunar Laser Ranging: A Continuing Legacy of the Apollo Program
18.01.1994
Sonstige
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Englisch
Lunar science - The Apollo legacy
NTRS | 1975
|Post Apollo manned lunar program
NTRS | 1970
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