Umbriel (moon) that obliterated its older surface. Covered by numerous impact craters reaching in diameter, Umbriel is the second most heavily cratered satellite of Uranus after Oberon. The most prominent surface feature is a ring of bright material on the floor of Wunda crater. This moon, like all moons of Uranus, probably formed from an accretion disk that surrounded the planet just after its formation. The Uranian system has been studied up close only once, by the spacecraft "Voyager 2" in January 1986. It took several images of Umbriel, which allowed mapping of about 40% of the moon’s surface. Umbriel, along with
Planet Moon Studios Planet Moon Studios Planet Moon Studios was a game development studio based in San Francisco, California founded by ex-Shiny Entertainment developers Nick Bruty (President) and Bob Stevenson (CEO) in 1997. Planet Moon developed the games "" (Interplay, 2000), "Armed and Dangerous" (LucasArts, 2003) and "Infected" (Majesco Entertainment, 2005). The games are generally critically acclaimed for both gameplay and graphics, and are often lauded for their humor in various reviews. In January 2011, Bigpoint Games acquired the Planet Moon Studios staff in San Francisco, California, but did not acquire the company, its intellectual properties, or its other assets. Shortly thereafter, Planet