Why is the Moon Rusting?

 The moon is...rusting. Very slowly, but it's starting to turn slightly red.

What's going on is that hematite is forming on the moon's surface, especially at the poles. Here's the thing?

For rust, you have to have iron, water, and oxygen. The moon has iron, but very little water and no oxygen.

So, how the heck is the moon rusting?

The answer lies in the Earth's magnetosphere, which has a long tail that allows traces of oxygen, just tiny amounts, to reach the Earth. To prove this theory, we need to take a look at the far side of the moon; there should not be any rust there.

(And no, the moon won't turn all the way red, at least not any time soon...)