Umbriel (Sol 7c) is a moon of Uranus (Sol VII), United Empire of Earth (UEE). One of the darkest in color of the moons of Uranus, one of its larger craters has a ring of reflective material on its floor, making Umbriel appear as if it has a single small eye. Visual artist Tamsa Wheel utilized ice harvested from this ring as the centerpiece in her SEY 2949 sculpture "The Anthropic Principle."