Miranda one of the smallest known icy moons of Uranus being only 313 miles or 470 kilometers in size. It is also the innermost of the five largest moons. Yet is still the best studied because the Voyager spacecraft used it as a gravitational booster to help it reach Neptune. Therefore it came very close to it. As it did it was able to photograph Miranda with a fairly high resolution and clarity. With these pictures it was discovered that Miranda has valleys as deep as 10 kilometers and as wide as 50 kilometers, these valleys are believed to have been created by large-scale tectonic stresses. As you may already know tectonic stresses are what causes Earth quacks here on Earth. Yet it also helps to build mountains. Therefor Miranda has mountain ranges that cover about half of its surface. Also do to its tectonic stresses it has a cliff which is about twelve miles high. By studying Miranda's surface, scientists think that its interior is filled with ice. The astronomer G. Kuiper discovered Miranda in 1948.

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