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Ariel (Astronomy)
In astronomy, one of planet Uranus' moons.
Named after a mischievous airy spirit in
Shakespeare's play,
The Tempest,
Ariel was discovered in 1851 by William Lassell, and is the brightest moon of Uranus.
Its frozen surface is a mixture of craters and rift valleys hundreds of
kilometers long and more than 6 miles deep.
Most everything we know about this moon
was discovered by the Voyager 2 spacecraft in 1986. Astronomers believe that
some sort of process has reshaped its surface, because Ariel's canyon
floors appear as though they have been smoothed by some liquid flow. It is
speculated that these flows could have been of ammonia, methane or even
carbon monoxide.
Ariel has no detectable atmosphere and no
magnetic field, which added to its other characteristics makes it a very inhospitable world for beings such as
ourselves.
Other facts and figures about Ariel:
-- Distance from Uranus: 190,945 km.
-- Equatorial
Radius: 581.1 x 577.9 x 577.7 km.
-- Mass:
1,350,000,000,000,000,000,000 kg.
-- Orbit Period
(Length of Year): 2.52037935 Earth days.
-- Orbital
Eccentricity: 0.0034.
-- Orbital
Inclination to Ecliptic: 0.3 degree.
See
Exobiology
and Universe, Time
and Space.
Source:
NASA.
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