Ariel and Umbriel
On October 24th 1851 William Lassell observing
from Liverpool discovered the moons Ariel and Umbriel which orbit Uranus. The
two moons are nearly the same size.
Ariel is the fourth largest of the moons of Uranus. It was
named after a mischievous airy spirit in Shakespeare's play, The Tempest. The
moon has a diameter of 719 miles.
Umbriel is the third largest moon. It is named after the
dusky, melancholy sprite from Alexander Pope's The Rape of the Lock. The moon has
a diameter of 727 miles.
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