Moon getting contaminated with Earth oxygen

*Could a microbe spore make it out there, one idly wonders.

Wafting magnetism

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The moon spends some time in two different environments; for most of its orbit around the Earth, the natural satellite is exposed to the solar wind and picks up ions from that. When the moon passes out of view of the sun, it is in the region where the Earth's magnetic field stretches out onto space, away from the sun (this is called the magnetotail). At those times, charged particles from Earth, and only the Earth, will reach the moon.

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