Corona, city, United States
Corona (kərō`nə), city (1990 pop. 76,095), Riverside co., S Calif.; inc. 1896. The city developed as a primary citrus fruit producer and shipping center. There is also light manufacturing. The name Corona ("circle") was derived from the 3 mi (5 km) circular drive around the city that was once used for car racing. State prisons for men and women are nearby. Cleveland National Forest and hot springs lie in the vicinity.corona, in astronomy
corona, luminous envelope surrounding the sun sun, intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the solar system in their orbits...... Click the link for more information. , outside the chromosphere. Its density is less than one billionth that of the earth's atmosphere. The corona is visible only at the time of totality during a total eclipse of the sun. It then appears as a halo of light with an irregular outer edge, often with streamers radiating from the sun's surface and contrasting with the dark lunar disk that it borders. It is divided into the inner corona, a ring of pale-yellow light against which crimson prominences are outlined, and the outer corona, a pearly white halo that extends far out into space. The corona consists of ionized gas at a temperature of 1 million°C;. By means of the coronagraph coronagraph , device invented by the French astronomer B. Lyot (1931) for the purpose of observing the corona of the sun and solar prominences occurring in the chromosphere.
..... Click the link for more information. , the innermost part of the corona can be studied and photographed in full daylight. Although the visible corona extends a few solar radii above the sun, because of its high temperature it produces a continual flow of electrically charged particles called the solar wind solar wind, stream of ionized hydrogen—protons and electrons—with an 8% component of helium ions and trace amounts of heavier ions that radiates outward from the sun at high speeds.
..... Click the link for more information. that move outward through the solar system.
corona
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Total solar eclipse. The delicately structured glow of the solar corona—or solar …
(credit: Copyright AURA Inc./National Optical Astronomy Observatories/National Science Foundation)
corona
(1) See corona wire.(2) (Corona) The code name for Windows Media Player 9, introduced in 2003. It improved the Windows Media Video codec and added the Windows Media Audio Professional codec for 5.1 surround sound at 24 bit, 96 kHz sampling. It also included Fast Stream, providing instant-on audio and video streaming for high-bandwidth connections.
corona
1. a circle of light around a luminous body, usually the moon
2. the outermost region of the sun's atmosphere, visible as a faint halo during a solar eclipse
3. Architect the flat vertical face of a cornice just above the soffit
4. a circular chandelier suspended from the roof of a church
5. Botany
a. the trumpet-shaped part of the corolla of daffodils and similar plants; the crown
b. a crown of leafy outgrowths from inside the petals of some flowers
6. Anatomy a crownlike structure, such as the top of the head
7. Zoology the head or upper surface of an animal, such as the body of an echinoid or the disc and arms of a crinoid
8. a long cigar with blunt ends
9. Physics short for corona discharge
corona [kə′rō·nə]
(architecture)
The overhanging vertical member of a cornice.
(astronomy)
(botany)
An appendage or series of fused appendages between the corolla and stamens of some flowers.
The region where stem and root of a seed plant merge. Also known as crown.
(electricity)
(geology)
A mineral zone that is usually radial about another mineral or at the area between two minerals. Also known as kelyphite.
(invertebrate zoology)
The anterior ring of cilia in rotifers.
A sea urchin test.
The calyx and arms of a crinoid.
(metallurgy)
An area sometimes surrounding the nugget at the faying surfaces of a spot weld which provides a degree of bond strength.
(meteorology)
A set of one or more prismatically colored rings of small radii, concentrically surrounding the disk of the sun, moon, or other luminary when veiled by a thin cloud; due to diffraction by numerous waterdrops.
(mineralogy)
An annular zone of minerals that is disposed either around another mineral or at the contact between two minerals.
corona
corona
Corona
light, misty rings in the heavens around the disk of the sun or moon and, less frequently, around bright stars and terrestrial light sources. A corona forms when translucent clouds (usually altocumulus) or fog passes in front of the light source; a corona is distinguished from a halo by the former’s smaller radius (not more than 5°). Coronas are explained by the diffraction scattering of rays from the light source on the drops of water that form the cloud or fog. On the basis of the theory of coronas, it is possible to determine the diameter of the drops in clouds according to the observed angular radii of individual rings or the dark spaces that separate them and to discern clouds consisting of water and ice particles. The radii of the rings depend on the wavelength of the rays which cause the coloration of the corona; the outermost ring takes on a reddish color. When drops of all possible sizes are present in the atmosphere, the superimposed corona rings form a general white glow around the disk of the light source; this is called a perihelion aureole.
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