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"So where does the oxygen come from? Shuai Li and team suggest it comes from Earth's upper atmosphere. ... The effect would be strongest on the Moon's Earth-facing hemisphere, consistent with the distribution determined by Li and colleagues using M3 data."

High-res photos of moon regularly show the red areas, e.g. https://www.reddit.com/r/space/comments/exf4yp/one_year_ago_...

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The large reddish regions in this stitch do not seem to correlate with the concentrations of hematite that researchers detected.

> The maps show the hematite occurrences at latitudes greater than 75 degrees but in fact, almost all the hematite detections occur at latitudes greater than 60 degrees. Furthermore, an asymmetry exists in the distribution of hematite: In both polar regions, most of the hematite detections are on the Earth-facing hemisphere (the Earth direction is 0 degrees on each map). Finally, the floors of craters (visible as shaded relief beneath the colors on the maps) rarely contain hematite signals; flat places do not have much hematite. So, hematite is associated with the Earth-facing directions of the lunar polar regions.

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