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1. a white or colored circle or set of concentric circles of light seen around a luminous body, esp. around the sun or moon.2. Meteorol. such a circle or set of circles having a small radius and ranging in color from blue inside to red outside, attributable to the diffraction caused by thin clouds, mist, or sometimes dust (distinguished from halo).3. Also called aureola, aureole. Astron. a faintly luminous envelope outside of the sun's chromosphere, the inner part consisting of highly ionized elements.4. a long, straight, untapered cigar, rounded at the closed end.5. Bot. a crownlike appendage, esp. one on the inner side of a corolla, as in the narcissus.6. Anat. the upper portion or crown of a part, as of the head.7. Elect. See corona discharge.8. Archit. the projecting, slablike member of a classical cornice supported by the bed molding or by modillions, dentils, etc., and supporting the cymatium.9. the tonsure of a cleric.10. Eccles. a gold-colored stripe around the lower edge of a clerical headdress, as of a miter.11. a chandelier of wrought metal, having the form of one or more concentric hoops.[1555-65; < L corona garland, CROWN < Gk koróne crown, curved object; akin to koronís curved, beaked, kórax CROW, raven]
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The Sun's corona has a temperature of about 3.6 million °F (2 million °C) and a very low density. Extending more than 8 million mi (13 million km) from the photosphere, it has no definite boundaries, continually varying in size and shape as it is affected by the Sun's magnetic field. The solar wind is formed by expansion of coronal gases. Only about half as bright as the full moon, the corona is overwhelmed by the brilliance of the solar surface and normally not visible to the unaided eye, but a total eclipse permits naked-eye observations.
Total solar eclipse. The delicately structured glow of the solar coronaor solar ...Copyright AURA Inc./National Optical Astronomy Observatories/National Science Foundation* * *
city, Riverside county, southwestern California, U.S. Located about 45 miles (70 km) southeast of Los Angeles, Corona lies at the east end of the Santa Ana Canyon on the northeastern edge of the Santa Ana Mountains. Originally inhabited by Luiseño Indians, it became part of the Rancho La Sierra land grant. It was laid out as South Riverside when Queen Colony, a citrus growers' organization, was established (1886). In 1896 it was renamed Corona (Spanish: “Crown”) for a 3-mile (5-km) circular drive that is now around the central city and was the site of international automobile races from 1913 to 1916. Largely known for its agricultural products, it was the site of the first lemon-processing plant (1915) in the United States and subsequently developed as a citrus-processing and shipping centre. Other crops include alfalfa, sugar beets, tomatoes, and walnuts. Light manufacturing, mining, and retail are economically important. A notable local attraction is the Fender Museum of Music and the Arts (opened 2002), which provides educational programming for children. Mathews Dam to the east impounds Lake Mathews. Cleveland National Forest, Chino Hills State Park, and Glen Ivy Hot Springs are nearby. Inc. 1896. Pop. (1990) 76,095; (2000) 124,966.* * *
Universalium. 2010.
