A few high points near the Moon's south pole are in sunlight more than 80% of the year, because the Moon barely tilts and the Sun barely dips.

The Moon's axis leans only 1.5 degrees, so at the poles the Sun grinds around the horizon rather than rising and setting. Stand somewhere high and you almost never lose it. Not one of these ridges is lit continuously — the honest term is near-continuous — but a solar panel there works most of the time, and a crater floor a few kilometres away has not seen the Sun in two billion years.