Precisely measuring the distance to the moon

Details Precisely measuring the distance to the moon Precisely measuring the distance to the moon

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990e%26s.....3....6f&link_type=abstract

Earth in Space (ISSN 1040-3124), vol. 3, Dec. 1990, p. 6, 7.

Astronomy and Astrophysics

Astronomy

Earth-Moon System, Laser Range Finders, Lunar Rangefinding, Lunar Surface, Accuracy, Distance, Geodesy, Reflectors

Scientific paper

Continuing improvements in the lasers and the detection electronics over the years which have led to accurate measurements of the distance from the earth to the moon are discussed. The first reflector of laser light pulses, deployed on the moon surface twenty years ago by the Apollo 11 astronauts, consisted of 100 fused silica corner cubes, and reflected a beam of light directly back toward its point of origin. Observatories located in Texas, Hawaii, and France now regularly range the moon with an accuracy of approximately 1 inch. Ranging programs have also been carried out in Australia and the Soviet Union. The ranges are computer-analyzed to determine precisely the positions of the observatories on earth, the positions of the reflectors on the moon, the orbit of the moon around the earth, and the rotation and orientation of the earth and the moon. The most important scientific advances derived from lunar ranging are also reviewed.

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