Ice Next to the Sun: What MESSENGER Found on Mercury
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Ice Next to the Sun: What MESSENGER Found on Mercury
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The planet closest to the Sun has ice. NASA says its MESSENGER spacecraft verified it: deposits at Mercury's poles that are mostly water ice, on a planet where sunlit ground reaches 800 degrees Fahrenheit.
In this episode: why day and night on Mercury sit about 1,090 degrees apart. The radar echo from Arecibo in 1991, and why radar alone was not proof. The three lines of evidence MESSENGER reported in 2012, including a measurement of hydrogen, not of water. The dark layer that covers most of the ice. Then Beyond the Obvious: craters near the poles that stay below minus 280 degrees, on the same planet and at the same moment as ground at 800. We go through what is still open: where the ice came from, how old it is, and what the dark layer is made of. And we follow BepiColombo, the European and Japanese mission due in orbit on November 21, 2026, including what the European Space Agency says it will not settle.
Every figure comes from NASA, ESA, Johns Hopkins APL and UCLA pages, linked in the video description on YouTube. Where the sources disagree or don't know, we say so.
Watch the video edition: https://youtu.be/R-elPYGY6Es
Narration: synthetic voice. Research, writing and editing: human work. Echoes of the Void.