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Photonic Return Charts Course for Laser-Ranging Experiments

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JAKE SALTZMAN, NEWS EDITOR [email protected]

Extensively in the last 50 years, intermittently in the last decade, and with newfound success in receiving a return on their efforts this past summer, NASA scientists have taken aim at the moon with high-power laser beams. Receiving even a faint signal back from the moon is a stark improbability: NASA estimates that a photon launched from Earth has about a 1-in-25-million chance of reaching the Apollo 11 reflector, which has been on the moon since 1969. The successfully acquired return signals have held considerable value. Just clocking the response time that it takes light sent from...Read full article

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