Corona

Corona Borealis, the Northern Crown, is a lovely semicircle of stars centered in the picture and opening to the left. Alphecca, or Gemma, is the bright star at the Crown's center directly in the middle of the picture.

Coronal loops are the basic structures of the magnetic solar corona. These loops are the closed-magnetic flux cousins of the open-magnetic flux that can be found in coronal hole (polar) regions and the solar wind.

Corona Related Category: Astronomy: General luminous envelope surrounding the sun, outside the chromosphere. Its density is less than one billionth that of the earth's atmosphere.

Corona Borealis, also known as the Corona septentrionalis, and the Northern Crown or Garland, is a constellation of the Northern hemisphere, mentioned by Eudoxus (4th cent. B.C.) and Aratus (3rd cent. B.C.).

Corona The corona is the collection of immediate gases around the Sun. It is extremely hot, much hotter than the surface of the Sun.

Coronagraphs operating within Earth's atmosphere suffer from scattered light in the sky itself, due primarily to Rayleigh scattering of sunlight in the upper atmosphere.

Corona Extra, their most popular brand, is reputedly the number-one selling beer in Mexico, as well as the number one imported beer in the US.

Corona Australis, the southern crown: One of the most difficult of the ancient constellations to see from the United States.

Corona Austrina Abbreviation: CrA Genitive: Coronae Austrini Translation: The Southern Crown Peoria Astronomical Society Corona Austrina Page Interactive star chart (Java applet) ...

Corona Borealis Transit Date of principal star: 16 May Corona Borealis, or the Northern Crown, is the crown Ariadne wore at her wedding. It was made by the supreme goldsmith, Hephaestus, at his underwater smithy.

coronagraph Home ... Science and Technology Astronomy and Space Exploration Astronomy: General ... Essential reading Compare side-by-side A Dictionary of Astronomy The Columbia Encyclopedia, Sixth Edition ...

Coronary thrombosis is a form of thrombosis affecting the coronary circulation. It is associated with stenosis subsequent to clotting. The condition is considered as a type of ischaemic heart disease....

R Coronae Australis lies in the north central edge (19:01:53.65-36:57:07.62, ICRS 2000.0) of Constellation Corona Australis (see David Malin's photo, also at Astronomy Picture of the Day), ...

Definition: coronagraph: A special telescope which blocks light from the disk of the Sun in order to study the solar atmosphere. See the image on the right for more information. Space Tragedies9 Planets in Nine DaysAstronomy 101 Related Articles ...

Coronal loops have become very important when trying to understand the current coronal heating problem.

Coronagraphs allow us to see only the outer parts of the corona, because the instrument blocks our view of the inner corona. X-ray images can show us the parts closer to the Sun, because there's no need to block out the solar disk. More info: ...

Coronal Mass Ejection Loops of hot gas trace the magnetic fields above an active solar region as it rotates into view of the TRACE satellite (top).

Corona Australis was known to the Greeks not as a crown but as a wreath, which is how it is depicted on old star maps. Aratus did not name it as a separate constellation but referred to it as a circlet of stars beneath the forefeet of Sagittarius.

Corona. Another important set of unknown lines revealed during an eclipse came from the corona, and so its source element was called coronium.

Corona Australis Abbreviation: CrA English name: Southern Crown Coordinates see Stellar data Particulars: ...

Selu Corona Located in Terra, Corona measures 350 km (210 mi) in diameter. are circular to elliptical features marked by a ring of concentric ridges, and are thought to result from the flow of heat in the planet's interior.

The Solar Corona, as seen in a total eclipse The problem is, no one can really explain how this corona exists. Even if the temperature in the core of the Sun does reach 15 million degrees, it drops to a mere 5000 degrees at the surface.

Alphekka (Alpha Coronae Borealis) Map © 2003 Torsten Bronger Also known as Gemma, the brightest star in the constellation Corona Borealis.

Coronal holes are regions where the corona is dark. These features were discovered when X-ray telescopes were first flown above the earth's atmosphere to reveal the structure of the corona across the solar disc.

Coronal mass ejections are giant magnetic bubbles that expand to nearly the size of the Sun itself as they leave the low corona. The CMEs move outward at speeds from 200 to 1,000 km/s (100 to 600 mi/s).

Coronal loops, immense coils of hot gas on the surface of the Sun, vibrate wildly after the blast wave from a solar flare hits them. However, their dance is quickly squelched by resistance from the Sun's outer atmosphere (corona).

Coronal Holes The best-known early observations of the Sun from space were the ones made in 1973 from the space station Skylab.

Coronal Mass Ejection (CME). An observable change in coronal structure that occurs on a time scale between a few minutes and several hours, and involves the appearance of a new discrete, bright, white light feature in the coronagraph field of view, ...

Coronagraph An instrument that makes it possible to observe the corona at times other than during an eclipse. A simple lens focuses the Sun onto a disk that blocks the light from the solar disk, providing an artificial eclipse.

Corona Borealis Abbreviation: CrB Genitive: Coronae Borealis Translation: The Northern Crown Interactive star chart (Java applet) ...

Corona Borealis Map created in Guide 7.0 with the figure outline based on Johannes Hevelius' Uranographia (1690). Click on the object's name to access its image or click on the name of adjacent constellation to see its map.

CORONA The very hot outermost layer of a star's atmosphere. Our Sun's corona can only be seen during a total solar eclipse. COSMONAUT An astronaut from the former Soviet Union or the current republic of Russia.

Coronal Loops closed magnetic field line loops around sunspots and active regions can last for days or weeks if not associated with solar flares Coronal Mass Ejections (CME) ...

corona - Outer atmosphere of the sun. coronagraph - An instrument for photographing the chromosphere and corona of the sun outside of eclipse.

Corona: The 'atmosphere' of the Sun that can be viewed during a solar eclipse. Cosmic Background Radiation: The remnant radiation from the Big Bang. Its distribution in the universe today can tell us about how the universe may have formed.

Coronagraph A type of telescope designed to view the Sun's Corona. Cosmic rays ...

Coronae Pancake volcanoes Magellan's images show a wide variety of interesting and unique features including pancake volcanoes (left) which seem to be eruptions of very thick lava and coronae (right) which seem to be collapsed domes over large magma ...

Corona The outermost layer of the atmosphere of a star, including the Sun. The corona is visible during a solar eclipse or when special adapters or filters are attached to a telescope to block the light from the star's central region.

corona The outermost atmosphere of a star (including the Sun), millions of kilometers in extent, and consisting of highly rarefied gas heated to temperatures of millions of degrees.

Corona- the high-temperature outermost atmosphere of the sun, visible from Earth only during a total solar eclipse Coronagraph- a special telescope which blocks light from the disk of the Sun in order to study the faint solar atmosphere ...

Corona The outer part of the Sun's atmosphere. The corona is visible from Earth during a total solar eclipse. It is the bright glow seen in most solar eclipse photos.

Coronal Mass Ejection: The mass ejected from the Sun due to a solar flare.

corona The uppermost level of the solar atmosphere, characterized by low densities and high temperatures (> 1,000,000 degrees K).

Coronagraph A telescope designed to photograph the inner corona of the sun. Coronal Hole ...

Corona: The atmosphere of the Sun composed of hot, very thin gas, extending out away from the Sun for a substantial distance. This gas emits light but normally that light can't be seen against the direct glare of the Sun.

corona -- the outer, hottest part of the Sun's atmosphere. coronal hole -- a low-density region in the Sun's corona. The solar wind may originate in these regions.

Corona the outermost layer of the solar atmosphere. The corona consists of a highly rarefied gas with a low density and a temperature greater than one million degrees Kelvin. It is visible to the naked eye during a solar eclipse.

corona The thin and hot upper atmosphere of the Sun, visible only with special filters or during a total solar eclipse.

Corona - A type of surface feature of Uranus's satellite Miranda. Coronae consist of parallel ridges and troughs producing a striped appearance. Coronae have sharp boundaries.

corona - (n.) The very hot, extended outer atmosphere of the sun and other cool main-sequence stars.

Coronagraph. An instrument that allows study of the Sun's inner corona at times of non-eclipse.

CORONAL HOLES Coronal holes are areas in the coronal where the Sun's magnetic field loops out into space instead of looping back into the Sun, areas of magnetic anomalies (they often occur at the poles).

Corona Outermost atmosphere of the Sun immediately above the chromosphere, consisting of hot (1-2 × 106 K), low-density (about 10-16 g cm-3) gas that extends for millions of miles from the Suns's surface.

The Corona. The outer solar atmosphere, which extends for several solar radii from the disk of the sun, is the corona. All the structural details in the corona are due to the magnetic field.

The corona is known to be very hot because it has ions with many electrons removed from the atoms. At high enough temperatures the atoms collide with each other with such energy to eject electrons. This process is called ionization.

The corona is the top layer of the atmosphere; it extends for millions of miles beyond the Sun's surface. The corona has very high temperatures (over a million ;K) and a very low density.

Solar corona studies conducted by a PI at JPL using DSN's radio link with various interplanetary spacecraft as they pass behind the Sun.

[10.5] CORONA IN ORBIT / GRAB [10.6] FOUNDATION OF THE NRO / SAMOS & MIDAS [10.7] THE FISHBOWL SPACE NUCLEAR TESTS / THE TEST-BAN TREATY ...

The solar corona is the outermost part of the Sun's atmosphere. Coronal holes occur where a region is more tenuous than the surrounding corona and are thought to be the primary source of high-speed streams of charged particles from the Sun.

In 2375, the corona of an O-type star in the Delta Quadrant served to contain the explosion of a Malon export vessel, that otherwise would have destroyed everything within three light years.

See also: Sun, Solar, Light, Earth, Star