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Ceres (in astronomy)

Ceres (sîr´ēz), in astronomy, a dwarf planet, the first asteroid to be discovered. It was found on Jan. 1, 1801, by G. Piazzi. He took three distinct observations; on the basis of these the mathematician Gauss calculated Ceres' orbit with such accuracy that it was found one year later within 0.5° of the predicted position. Ceres is the largest and most massive of the asteroids; it has a diameter of c.590 mi (949 km) and a mass 1/100,000 that of the earth. Its orbit has a semimajor axis of 2.78 astronomical units and a period of 1,681 days. From its discovery until the 1850s, when many additional asteroids began to be identified, Ceres was regarded by many astronomers as a planet. In 2006 the reconsideration by astronomers of Pluto's status as a planet also led to the reclassification of Ceres as a dwarf planet. The NASA space probe Dawn went into orbit around Ceres in 2015.

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"Ceres (in astronomy)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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Ceres (in Roman religion and mythology)

Ceres (sîr´ēz), in Roman religion and mythology, goddess of grain; daughter of Saturn and Ops. She was identified by the Romans with the Greek Demeter. Her worship was connected with that of the earth goddess and involved not only fertility rites but also rites for the dead. Her chief festival was the Cerealia, celebrated on Apr. 19, and her most famous cult was that of the temple on the Aventine Hill. There is much argument about the origins and nature of her cults.

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Ceres

Ceres Largest asteroid and the first to be discovered (January 1, 1801, by Guiseppe Piazzi). Ceres' diameter measures 913km (567mi). It orbits in the main asteroid belt, at an average distance from the Sun of 414 million km (257 million mi), the distance of the ‘missing’ planet predicted by Bode's law.

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"Ceres." World Encyclopedia. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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Ceres

Ceres The largest solar system asteroid (No. 1), diameter 974 km, approximate mass 1021 kg; rotation period 9.078 hours; orbital period 4.6 years. It was discovered in 1801 by G. Piazzi. It accounts for almost half the total estimated mass of all the asteroids.

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"Ceres." A Dictionary of Earth Sciences. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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Ceres

Ceres in Roman mythology, the corn goddess, the equivalent of the Greek Demeter.

In astronomy, Ceres is the name of the first asteroid to be discovered, found by G. Piazzi of Palermo on 1 January 1801.

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"Ceres." The Oxford Dictionary of Phrase and Fable. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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Ceres

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"Ceres." Oxford Dictionary of Rhymes. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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CERES

CERES (ˈsɪəriːz) (USA) Coalition for Environmentally Responsible Economies

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"CERES." The Oxford Dictionary of Abbreviations. . Encyclopedia.com. 18 Aug. 2017 <http://www.encyclopedia.com>.

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