Mercury and water ice

[mstarry]

How is it possible that there is water ice on Mercury's surface?
I don't understand this.
Are the poles never exposed to the sun's rays?

[Laika]

It seems that some polar craters are in permanent shadow. Water vapour might freeze and persist in such environments.

[Ophiolite]

While in contrast a portion of mountain range in the moon's polar regions is apparently in permanent sunlight. Ideal for a solar power generating station.

[cato]

wouldn't space be a more ideal place for solar power generation? if we have the tech to colonize mercury, we may as well just figure out a way to life in space.

--my two cents