Has Mercury’s Ice Finally Been Seen? (Hint: Yes.)

October 16, 2014 3:16 PM

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Has Mercury’s Ice Finally Been Seen? (Hint: Yes.)

The last place in the solar system you’d expect to find ice (except maybe on the Sun, duh) is Mercury. Rocky, barren, airless, and very, very hot, Mercury doesn’t sound like the ideal location for storing vast quantities of frozen water.

But in the 1990s evidence started coming in that perhaps Mercury was holding a surprise. At its north pole are deep craters, and because of their high latitude, the low Sun never reaches the crater floors. They’re permanently dark, and because of that they’re very cold. Cold enough to hold on to any...

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