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Umbriel

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Umbriel (ŭm`brēĕl'), in astronomy, one of the moons, or natural satellites, of Uranus Uranus , in astronomy, 7th planet from the sun, at a mean distance of 1.78 billion mi (2.87 billion km), with an orbit lying between those of Saturn and Neptune; its period of revolution is slightly more than 84 years.
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Umbriel [′əm·brē·əl]
(astronomy)
A satellite of Uranus orbiting at a mean distance of 165,300 miles (266,000 kilometers) with a period of 4.144 days, and with a diameter of about 740 miles (1190 kilometers).

Umbriel 

a satellite of the planet Uranus. Umbriel has a diameter of about 1,000 km and is at a mean distance of 267,000 km from the center of the planet. The satellite was discovered in 1851 by W. Lassell. The orbital plane of Umbriel is nearly perpendicular to the orbital plane of Uranus.



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The poem goes on to tell how Umbriel, a dusky melancholy sprite, in order to make the quarrel worse, flew off to the witch Spleen, and returned with a bag full of "sighs, sobs, and passions, and the war of tongues," "soft sorrows, melting griefs, and flowing tears," and emptied it over Belinda's head.
 
 
 
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