Echoes from the Moon

Details Echoes from the Moon Echoes from the Moon

2009-03-19

arxiv.org/abs/0903.3367v1

Am. J. Phys. 77 (2009) 854-857

Physics

Physics Education

7 pages, 2 figures

Scientific paper

10.1119/1.3098261

We report on a determination of the Earth-Moon distance performed by students of an Italian high school, based on measurements of the time delay of the "echo" in the radio communications between Nasa mission control in Houston and the Apollo astronauts on the lunar surface. By using an open-source audio-editing software, the distance can be determined with three digits accuracy, allowing to detect the effect due to the eccentricity of the orbit of the Moon.

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