Umbriel may be the darkest of Uranus’ biggest moons. It reflects only 16 p.c of the light that strikes its area, a element similar to the highland areas of Earth’s moon. Huge-effects hypothesis. In Wikipedia. By NASA/JPL-Caltech, General public Domain, Wikipedia Moons sort by means of a range of processes, https://juliusz332lqu8.slypage.com/profile