Ariel (Uranus' Moon) - (Important Facts) {Part-50}

OF THE 27 KNOWN MOONS OF URANUS, of which only five are large enough to have a spherical shape, Ariel is the brightest.

Ariel

Formed form the material in orbit around Uranus, quite possibly as the result of the impact that tipped the planet onto its side , the moon is differentiated. Approximately 64% of its mass is a rocky core, with ice accounting for the rest.
The moon's fissured surface reveals evidence of the relatively recent tidal heating of its core, but it is unlikely that it is currently warm enough for liquid water to exist under the surface.

Pics of Ariel

Umbriel (Uranus' Moon) - (Important Facts) {Part-49}

UMBRIEL'S SURFACE IS HEAVILY CRATERED and is the darkest of the major Uranian moons.

Umbriel

Composed mostly of water ice, it is thought that the moon features a distinct rocky core that totals about 40% of its mass. The interior of the moon is not likely to be warm enough to support sub-screen ocean.

Physical Characteristics of Umbriel

Umbriel's most prominent feature is Wunda crater, an impact crater with a diameter of 13 km/ 81m, that features a bright ring of material on its floor, believed to be residue of the object that collided with the moon.

Wunda Crater

Titania (Uranus' Moon) - (Important Facts) {Part-48}

TITANIA IS COMPOSED OF EQUAL quantities of rock and ice, differentiated into distinct layers, with the possibility of liquid water where the ice meets the core.

Titania

The largest of the Uranian moons, Titania is the 8th largest moon in the Solar System.

Physical characteristics of Titania

Its surface is criss-crossed with huge cracks caused by expansion as it cooled after formation, but it features fewer craters than Uranus' other moons, indicating that it has been resurfaced in the past.

Oberon (Uranus' Moon) - (Important Facts) {Part-47}

ALTHOUGH ONLY THE SECOND LARGEST, Oberon is the most massive and outermost moon of Uranus.

Oberon

Like Uranus' other moons, Oberon is composed of equal quantities of ice and rock and is likely to have a defined core, with the possibility of a layer of liquid water surrounding it, if the water contains sufficient quantities of ammonia to stop it freezing.

Facts of Oberon

The reddest of the Uranian moons, Oberon also has the highest number of impact craters, indicating that its surface is the oldest. It also features large cracks, the result of expansion while its core was cooling.