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Planetary science

Planetary science

Estimates of water ice on the Moon get a ‘dramatic’ downgrade

22 Sep 2023 Margaret Harris
Photo of craters on the Moon, heavily shadowed
A shadowy harbour: Because the Sun strikes the Moon at such a low angle at its poles, sunlight never reaches the floors of some deep craters. These permanently shadowed regions trap volatile chemicals such as water ice, but the latest study shows they formed more recently than was previously thought, so current estimates of water ice on the Moon may be too high. (Courtesy: NASA’s Scientific Visualization Studio)
New estimates by planetary scientists in the US suggest that the Moon contains significantly less wa

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Margaret Harris is an online editor of Physics World
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