CommentRe:Leftover Oxygen? (Score 1)23
The moon, like all solid bodies, has a surface rich in oxides.
Honestly, this to me isn't as interesting with respect to the moon as it is with respect to Venus. Venus is very hydrogen deficient. If you could dramatically up its hydrogen capture rate (e.g. magnetic lensing) and in a way that would greatly exceed the loss rate (normally we think of the solar wind as a loss mechanism), it would have a wide range of effects that would make it more earthlike. In particular, you'd get the Bosch reaction, where H2 and CO2 react to form water and graphite. Venus's surface is active (both volcanism, and while it has no subduction, it has microplates that jostle up against each other), so over geological timescales, surface carbon will be sequestered. So you're lowering the pressure, lowering the temperature, raising the water, and lowering the acidity. Also, if the water content in the crust rises over geological timescales, it becomes more ductile, so potentially - after immense timescales - you might *possibly* start/restart plate tectonics
None of this would be at all on human timescales, but it's interesting to ponder whether Venus's conversion to a hellscape could be slowly reersed.