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Phoebe (in astronomy)

Phoebe (fē´bē), in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IX (or S9), Phoebe is 137 mi (220 km) in diameter, orbits Saturn at a mean distance of 8,047,985 mi (12,952,000 km), has an orbital period of 550.5 earth days, and rotates on its axis in about nine hours. The outermost of the known satellites, Phoebe was discovered by American astronomer William H. Pickering in 1898. Phoebe's reflectivity is very low, and it appears to be composed of a mix of ice and rock. Its orbit is inclined 175° to Saturn; that is, its north pole is almost aligned with the planet's south pole. Phoebe orbits with retrograde motion, i.e., opposite to that of the planet's rotation. The sharp inclination of its orbit, its retrograde motion, and the resemblance of its apparent density and composition to Kuiper belt objects (see comet) suggest that Phoebe is a captured object similar to a comet or asteroid rather than a native satellite.

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"Phoebe (in astronomy)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 27 Jul. 2017 <http://www.encyclopedia.com>.

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Phoebe

Phoe·be / ˈfēbē/ 1. Greek Mythol. a Titaness, daughter of Uranus (Heaven) and Gaia (Earth). She became the mother of Leto and thus the grandmother of Apollo and Artemis. In the later Greek writers, her name was often used for Selene (Moon). 2. Astron. a satellite of Saturn, the furthest from the planet and with an eccentric retrograde orbit, discovered in 1898. At a distance of 8 million miles (13 million km) from Saturn, it has a diameter of 137 miles (220 km).

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"Phoebe." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 27 Jul. 2017 <http://www.encyclopedia.com>.

"Phoebe." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (July 27, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/phoebe-0

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phoebe

phoe·be / ˈfēbē/ • n. an American tyrant flycatcher with mainly gray-brown or blackish plumage. • Genus Sayornis, family Tyrannidae: three species, in particular the common eastern phoebe (S. phoebe).

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Phoebe

Phoebe (Saturn IX) One of the lesser satellites of Saturn, with a radius measuring 115 × 110 × 105 km; visual albedo 0.06. Its orbit is retrograde. It was discovered in 1898 by W. Pickering.

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"Phoebe." A Dictionary of Earth Sciences. . Encyclopedia.com. 27 Jul. 2017 <http://www.encyclopedia.com>.

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Phoebe (in Greek mythology)

Phoebe, in Greek mythology, a Titan. She was the mother of Leto and Asteria and the grandmother of Artemis. In some legends she was identified with Artemis as the goddess of the moon.

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phoebe (in zoology)

phoebe, in zoology: see flycatcher.

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Phoebe (in the Bible)

Phoebe, in the Bible: see Phebe.

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phoebe

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"phoebe." Oxford Dictionary of Rhymes. . Encyclopedia.com. 27 Jul. 2017 <http://www.encyclopedia.com>.

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