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Next year, astronaut Matthias Maurer expects to walk on the surface of the Moon — but without the hassles of a rocket flight, zero-gravity nausea and a risky landing. Instead he’ll stroll close to home in a leafy meadow near Cologne, Germany, which is set to host the largest Moon mock-up ever made. On a pit of artificial lunar dust covering more than 1,000 square metres, Maurer and other scientists will be attached to crane-and-pulley systems that allow them to leap as if experiencing the Moon’s weaker gravity, and work under adjustable lamps that simulate lighting at different lunar sites. Sometimes, they will retreat to lunar-style living quarters: an airlock-connected module the size of a shipping container.