One of these objects features an unusual surface that lacks any medium-age craters.
One of these objects features an unusual surface that lacks any medium-age craters. That object also features a set of three ridged regions called coronae, and was discovered in 1948 by Gerard Kuiper. The darkest of these objects features a colorful ring structure initially called the "fluorescent cheerio," which is now believed to be the floor of the Wunda crater, while the brightest of these objects has a surface marked by a system of intersecting rift valleys. The two innermost of these objects act as shepherds to the epsilon ring, keeping it narrow, and most of the smaller ones of these objects were discovered by the Voyager 2 mission, although the largest were found by William Herschel. Including objects like Umbriel, Cordelia, and Miranda, FTP, identify these satellites of a certain icy gas giant with a sideways rotation axis.
One of these objects features an unusual surface that lacks any medium-age craters.
moons of Uranus [accept "satellite" for "moon" before mention]