He is, at this point, emotionally conditioned for moon living, having spent most of a lifetime guiding visitors on horseback around the 15 square miles of crater floor. (si.com)
The bright areas of Occator Crater — Cerealia Facula in the center and Vinalia Faculae to the side — are examples of bright material found on crater floors on Ceres. (sciencedaily.com)
Because the poles are always at the edge of the sunlit side of Mercury, flat areas receive little solar energy and long shadows keep polar crater floors in perpetual darkness. (newscientist.com)