Who would have thought that there would be ice on Mercury? It turns out that the bottoms of craters at the poles are eternally in darkness and ice is found there, partially created by the action of protons from the sun and OH- radicals in the rocks.
"Despite Mercury's 400-degree Celsius daytime heat, there is ice at its caps. And now a study shows how that Vulcan scorch probably helps the planet closest to the sun make some of that ice."
https://www.sciencedaily.com/releases/2020/03/200313155329.htm
Mercury's Scorching Daytime Heat May Help it Make Its Own Ice at Caps
Re: Mercury's scorching daytime heat may help it make its own ice at caps
