impact craters reaching 210 km (130 mi) in diameter, Umbriel is the second-most heavily cratered satellite of Uranus after Oberon. The most prominent surface...

to sporadic indications of satellites additional to Titania and Oberon. Eventually, the next two moons, Ariel and Umbriel, were discovered by William...

"Tidal evolution of the Uranian satellites: III. Evolution through the Miranda-Umbriel 3:1, Miranda-Ariel 5:3, and Ariel-Umbriel 2:1 mean-motion commensurabilities"...

nine mid-sized natural satellites, between 1,000 km and 1,600 km across, Titania, Oberon, Rhea, Iapetus, Charon, Ariel, Umbriel, Dione, and Tethys, the...

Plescia, J. B. (December 30, 1987). "Cratering history of the Uranian satellites: Umbriel, Titania and Oberon". Journal of Geophysical Research. 92 (A13):...

Shakespeare's The Tempest. Both Ariel and the slightly larger Uranian satellite Umbriel were discovered by William Lassell on 24 October 1851. Although William...

in which case they would not be satellite planets. The situation for Uranus's three smaller ellipsoidal moons (Umbriel, Ariel and Miranda) is unclear,...

Ariel and Umbriel in 1851, Lassell numbered the four real Uranian satellites then known outward from their parent planet as I (Ariel), II (Umbriel), III (Titania)...

Place-Names Committee from association with nearby Uranus Glacier, Umbriel being one of the satellites of the planet Uranus, the seventh planet of the Solar System...

light red). A crater on Umbriel is also named after Setebos, but with the spelling Setibos. Moons of Uranus Irregular satellites Shakespeare Recording Society...

"Tidal evolution of the Uranian satellites: III. Evolution through the Miranda-Umbriel 3:1, Miranda-Ariel 5:3, and Ariel-Umbriel 2:1 mean-motion commensurabilities"...

Plescia, J. B. (December 30, 1987). "Cratering history of the Uranian satellites: Umbriel, Titania and Oberon". Journal of Geophysical Research. 92 (A13):...

1×1021, Rhea—2.3×1021, Iapetus—1.8×1021, Charon—1.6×1021, Ariel—1.2×1021, Umbriel—1.3×1021, Dione—1.1×1021, Tethys—0.6×1021, Enceladus—0.11×1021, Miranda—0...

spectrum appears to be intermediate between Uranus's moons Titania and Umbriel, which suggests that Nereid's surface is composed of a mixture of water...

includes minor planets (asteroids and dwarf planets), planets, and natural satellites. All geological features of a body (including craters) are typically named...

and seven dwarf planets are known to be orbited by at least 300 natural satellites, or moons. At least 19 of them are large enough to be gravitationally...

crater on the surface of Uranus' moon Umbriel. It is 131 km in diameter and is located near the equator of Umbriel. The crater is named after Wunda, a dark...

is the twelfth-largest natural satellite in the Solar System. Charon is even similar in size to Uranus's moons Umbriel and Ariel. Charon's slow rotation...

"Tidal evolution of the Uranian satellites: III. Evolution through the Miranda-Umbriel 3:1, Miranda-Ariel 5:3, and Ariel-Umbriel 2:1 mean-motion commensurabilities"...

Titan was the first known moon of Saturn and the sixth known planetary satellite (after Earth's moon and the four Galilean moons of Jupiter). Titan orbits...

atmospheric details Miranda has a scarred surface A potential frost deposit on Umbriel's pole A cloud over the limb of Triton Ocean planet Ice planet Tectonics...

designation (a system introduced by Galileo) as "Jupiter I", or as "the first satellite of Jupiter". The customary English pronunciation of the name is /ˈaɪoʊ/...

In astronomy, a regular moon or a regular satellite is a natural satellite following a relatively close, stable, and circular orbit which is generally...

(where they are sometimes I and II). With the confirmation of Ariel and Umbriel, Lassell numbered the moons I through IV from Uranus outward, and this...

co-discovered Hyperion, a moon of Saturn. In 1851 he discovered Ariel and Umbriel, two moons of Uranus. In 1855, he built a 48-inch (1,200 mm) telescope...

systematic designation: Mars I) is the innermost and larger of the two natural satellites of Mars, the other being Deimos. The two moons were discovered in 1877...

planets Uranus Rings of Uranus Complete list of Uranus's natural satellites Miranda Ariel Umbriel Titania Oberon Uranus trojan (2011 QF99) Uranus-crossing minor...

of uniquely identifying features on the surface of a planet or natural satellite so that the features can be easily located, described, and discussed....

three sides by rock ridges, but open to the south, lying between Mount Umbriel and Venus Glacier in eastern Alexander Island, Antarctica. The Quadrangle...

Lock: Umbriel, Ariel, and Belinda. The first two are major bodies, named in 1852 by John Herschel, a year after their discovery. The inner satellite Belinda...