Umbriel may be the darkest of Uranus’ major moons. It displays only 16 per cent of the light that strikes its surface, a element similar to the highland regions of Earth’s moon. One of only two Martian moons, Phobos has become referred to as not more than a small rock. https://bestmoons16937.free-blogz.com/81992249/best-moons-things-to-know-before-you-buy