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Moon safe for long-term human exploration, first surface radiation measurements show

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Adam MannMoonwalkers take heart—China’s Chang’e 4 lander has made the first detailed measurements of the intense radiation that blasts the lunar surface and found that it’s safe for human exploration.

The results give researchers a better idea of how much protective shielding future crews will need.Astronauts on the Apollo missions of the 1960s and ’70s carried dosimeters to measure their radiation exposure, but the devices captured total exposure from their entire journey—not merely their time on the Moon’s surface.

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