Laser beam from the Moon to Earth

By the time the signal is analysed by scientists at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), it will have travelled roughly 400,000 kilometres and passed through Earths atmosphere. They discover that: “The atmosphere has a less pronounced influence than expected; the signal quality is very good,” says Dirk Giggenbach from the DLR Institute of Communications and Navigation.

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