Mercury has near-zero axial tilt, and massive craters on the poles. There glaciers on Mercury's south pole alone hold more water than all of Mars. They are of

Mercury has near-zero axial tilt, and massive craters on the poles. There glaciers on Mercury's south pole alone hold more water than all of Mars. They are of course in eternal darkness, but if want an artificial sun, just raise a diffuse reflector over the crater rim. If you need more concentrated energy, raise a mirror.