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
Solar eclipses on the Moon Solar Saros series of the Moon is the equivalent to the Lunar Saros series of the Earth. In a package of Wills's Cigarettes, one of the tobacco cards first issued in 1928 for a few years displays the solar eclipse on the Moon showing the atmospheric ring. This is considered the first depiction of a solar eclipse as seen on the Moon. Solar eclipses on the Moon Solar eclipses on the Moon are caused when the Earth passes in front of the Sun, blocking its light. Viewers on Earth will see a lunar eclipse. The solar eclipses are only seen