Oberon system3/17/2024 ![]() It is actually possible to see Uranus’s 4 largest moons with an amateur telescope. The picture above shows a mountain on the limb that rises 6 km above its surrounds. This indicates some geologic activity early in Oberon’s history. Large faults are also seen across the entire southern hemisphere of Oberon. Some of the crater floors are dark, perhaps covered with darker material (dirty water?) that upwelled into the crater. ![]() Some of the craters have rays of ejecta similar to those seen on Callisto. It has far more and larger craters than do Ariel and Titania. Oberon’s heavily cratered surface has probably been stable since its formation. All of Uranus’ large moons are a mixture of about 40-50% water ice with the rest rock, a somewhat larger fraction of rock than Saturn’s large moons such as Rhea. ![]() Oberon and Umbriel appear quite similar though Oberon is 35% larger. Oberon is the King of the Fairies and husband of Titania in Shakespeare’s Midsummer-Night’s Dream. Oberon (“OH buh ron”) is the outermost of Uranus’ large satellites and the second largest: orbit: 583,420 km from Uranus ![]()
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