Oceanography and Marine Science

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Tag Archives: Oceanography and Marine Science

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  • 20 Jul 2019
    Theo Gerkema

    A mirror on the Moon: 50th anniversary of the Apollo-11 mission

      In this memorable photograph (courtesy of NASA), we see astronaut Buzz Aldrin holding in his right hand a sophisticated mirror: the Laser Ranging Retro-Reflector (LR3). This mirror has now been standing on the Moon for 50 years. By sending a laser beam from the Earth to the mirror, and measuring the time it takes […]

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