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Word has it (from a NASA Media Alert) that MESSENGER, the first spacecraft to orbit Mercury, has observed something new and interesting on the first planet from the Sun, and we're going to cover the official announcement from NASA live!
... Watch the press conference live as it unfolds on NASA TV at 2 p.m. EST (and enjoy their regular broadcast before then)
Now the newest data from MESSENGER strongly indicate that water ice is the major constituent of Mercury's north polar deposits, that ice is exposed at the surface in the coldest of those deposits, but that the ice is buried beneath an unusually dark material across most of the deposits, areas where temperatures are a bit too warm for ice to be stable at the surface itself.
According to Paige, the dark material is likely a mix of complex organic compounds delivered to Mercury by the impacts of comets and volatile-rich asteroids, the same objects that likely delivered water to the innermost planet.The organic material may have been darkened further by exposure to the harsh radiation at Mercury's surface, even in permanently shadowed areas.
Originally posted by MystikMushroom
NASA: Trying to stay relevant since 1988.
On a serious note, I always assumed Mercury was to close to the sun to have frozen anything?