Prominences
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see chromosphere.
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Chromosphere - (kr´msfr´´) [Gr.
Definition: prominence: A strand of relatively cool gas in the solar corona which appears bright when seen at the edge of the Sun against the blackness of space.
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PROMINENCES
Prominences are among the most beautiful of solar phenomena. They are the analogues of clouds in the Earth's atmosphere, but they are supported by magnetic fields, rather than by thermal currents as clouds are.
Solar prominence
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A Solar Prominence
An arched prominence lifts off from the Sun, propelled by magnetic forces. This image was taken by the Skylab Space Station. It shows the Sun in ultraviolet light.
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A prominence is made up of relatively cold, dense plasma supported by the local magnetic field from falling back into the sun. They can survive like this for 200 days. The temperature of the plasma in a prominence is about 5000 K.
A typical prominence extends over many thousands of kilometres; the largest observed by SOHO was seen in 1997 and was some 350,000 km (216,000 miles) long - some 28 times the radius of the Earth.
SOLAR PROMINENCE
A solar prominence (also known as a filament) is an arc of gas that erupts from the surface of the Sun. Prominences can loop hundreds of thousands of miles into space.
Prominences
Prominences are dense clouds of material suspended above the surface of the Sun by loops of magnetic field.
Prominence is a structure in the Sun's corona consisting of cool plasma supported by magnetic fields. Prominences are bright structures when seen over the solar limb, but appear dark when seen against the bright solar disk.
prominence Loop or sheet of glowing gas ejected from an active region on the solar surface, which then moves through the inner parts of the corona under the influence of the Sun's magnetic field.
prominence--A mass of cloud-like gas that rises from the Sun's chromosphere
proton cycle--The fusion reactions that take place in the Sun which make it release energy ...
prominence
a large eruption of gas streaming off the surface of the sun into the corona
proper motion ...
prominence -- a large-scale gaseous formation above the surface of the Sun.
Prominence. A term identifying cloud-like features in the solar atmosphere. The features appear as bright structures in the corona above the solar limb and as dark filaments when seen projected against the solar disk.
Prominence, solar- a loop of cooler gas seen above the sun's surface, which sometimes erupts outwards into space
Proton- a positively charged particle that forms part of the nucleus of an atom ...
PROMINENCE - Structure that occurs above the photosphere of the Sun. Prominences may reach high into the corona, often as graceful loops that may hang suspended for many days.
prominence
A looping column of gas ejected from the surface of the Sun.
protoplanet
The initial stage of planetary formation. A protoplanet is a small clump of material that may accumulate material to become a planet.
Prominence
Eruptions of the solar surface. Visible during total solar eclipses.
Proper Motion ...
Prominence
an explosion of hot gas that erupts from the Sun's surface. Solar prominences are usually associated with sunspot activity and can cause interference with communications on Earth due to their electromagnetic effects on the atmosphere.
Prominences. A mass of glowing gas, mainly hydrogen, that rises from the surface of the Sun.
Proper motion. The movement of an individual star on the celestial sphere.
Prominence - A region of cool gas embedded in the corona. Prominences are bright when seen above the Sun's limb, but appear as dark filaments when seen against the Sun's disk ...
Prominence A cloud of cooler plasma extending high above the Sun"s visible surface, rising above the photosphere into the corona.
Prominence
A region of cool (104 K), high-density gas embedded in the hot (106 K), low-density Solar corona. Prominences are the flamelike tongues of gas that appear above the limb of the Sun.
Propagator ...
Rise to prominence
Alcibiades first rose to prominence when he began advocating aggressive Athenian action after the signing of the Peace of Nicias
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Prominence
An eruption of gas from the chromosphere of a star. Solar prominences are visible as part of the corona during a total solar eclipse.
Prominence:
Cloud of gas elevated above the solar surface.
Proper motion:
The apparent drift of a star across the sky, compounded from the motion of the star and the sun.
PROMINENCE
A solar prominence is an cloud-like arc of gas that erupts from the surface of the . Prominences can loop hundreds of thousands of miles into space.
prominence - (n.)
Solar gas protruding over the limb, visible to the naked eye only at eclipses but also observed outside of eclipses by its emission line spectrum. Prominences are at approximately the same temperature as the chromosphere.
A prominence beginning to erupt on the Sun's limb, caused by a cascade of rippling Alfven waves sparked by small-scale flares. Image: NASA/SDO/AIA.
A prominence seen in projection on the Solar disk. [H76]
Filar Micrometer
An instrument used with a telescope for visually measuring small angular separations (as between binary stars). [H76]
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Sun Prominence
This image was acquired from NASA's Skylab space station on December 19, 1973. It shows one of the most spectacular solar flares ever recorded, propelled by magnetic forces, lifting off from the Sun.
Solar prominence seen by Coronas-Photon.
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A solar prominence as seen by SOHO. Image credit: Solar and Heliospheric Observatory (SOHO). SOHO is a project of international cooperation between ESA and NASA.
Finally, solar prominences rise up through the chromosphere from the photosphere, sometimes reaching altitudes of 150,000 kilometers. These gigantic plumes of gas are the most spectacular of solar phenomena, aside from the less frequent solar flares.
solar prominence (NASA Thesaurus) Filamentlike protuberances from the chromosphere of the sun. Used for filaments (solar physics). solar prominence (NASA SP-7, 1965) = prominence.
A rather twisted prominence. Both images courtesy of SOHO/EIT consortium. SOHO is a project of international cooperation between ESA and NASA.
The photography of prominences was, after some preliminary trials by C. A. Young and others, fully realized in 1891 by Professor George E. Hale at Chicago, and independ- Promi- ently by Henri Deslandres at Paris.
See faculae, flare, flocculi, granules, prominence, spicules, sunspot. solar air mass The optical air mass penetrated by light from the sun for any given position of the sun in the sky. solar antapex See solar apex.
An ACTIVE PROMINENCE seen on the DISK. ACTIVE LONGITUDE. The approximate center of a range of heliographic longitudes in which ACTIVE REGIONS are more numerous and more FLARE-active than the average. ACTIVE PROMINENCE.
structure filament a strand of cool gas suspended over the photosphere by magnetic fields, which appears dark as seen against the disk of the Sun; a filament on the limb of the Sun seen in emission against the dark sky is called a prominence.
" So great is its prominence that it has two "announcer stars" that from the mid- northern hemisphere rise before it, Procyon and Mirzam.
The Yerkes (or Morgan) scheme uses strictly the relative prominence of disk and bulge (the Hubble classification includes arm structure) - these are generally correlated, but not uniquely.
(A magnetic polarity flip between northern and southern sunspots means one complete cycle is actually 22 years.) Part of this activity is the enhanced prominence of sunspots: dark cool regions on the Sun that are a mere 3,000 C, ...
Solar flares are eruptions more powerful than surge prominences (a flare is shown in the Sun + planets montage above). They will last only a few minutes to a few hours. A lot of ionized material is ejected in a flare.
Prominences (as shown in the photo below) are eruptions of the gas trapped in the magnetic fields in the chromosphere. Usually, they are about a few times the size of the Earth. Solar flares are much more violent eruptions.
He initiated in 1866 the spectroscopic observation of sunspots, and in 1868 he found that solar prominences are upheavals in a layer around the Sun, which he named the chromosphere.
In a solar prominence, charged particles stream up from the Sun, spiraling around magnetic field structures poking out of the solar surface, and ultimately fall back along those structures into the Sun.
The Sun's faint corona will be visible, and even the chromosphere, solar prominences, and possibly even a solar flare may be visible.
ACTIVE PERIOD - Lots of solar activity including sunspots, flares, prominences, and coronal mass ejections. Our Sun was most recently active during the late 1980's and early 1990's.
Photograph September 28, 1991
by Yohkoh Satellite ...
Prominences that seem to float above the photosphere are supported by, and threaded through with, magnetic fields. All the streamers and loops seen in the corona (the Sun's extended upper atmosphere) are shaped by magnetic fields.
The first astrophysicist, invented the spectroheliograph allowing photography of solar prominences in daylight, discovered magnetic fields in sunspots, planned and completed the 200-inch Mt. Palomar telescope.
active sun
The condition of the Sun characterized by unusually large numbers and size of spots, flares, and prominences. It is especially associated with maxima of the solar cycle.
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Two months later, Norman Lockyer used a cleaver technique and managed to observe the Solar prominence without waiting for an eclipse.
A loop of hot gas blasts off the surface of the Sun in one of the first images from Solar Dynamics Observatory, NASA's latest Sun-watching satellite. Known as a solar prominence, the loop is bigger than Earth.
These phenomena can be seen during an eclipse as small regions, which are called prominences, at the very edge of the sun, like jewels in a crown. Frequently they subside, but occasionally they erupt, blowing solar material into space.
Prominences, flares, coronal mass ejections
Helioseismology : observations and internal structure
The sun's energy source
Inadequacy of chemical or gravitational energy sources
Binding energy curve for all elements : ...
See also: List of astronomers There is also a well-known painting by Johannes Vermeer titled The Astronomer, which is often linked to Vermeer's The Geographer. These paintings are both thought to represent the growing influence and rise in prominence ...
"Well, with my little refractor, the blackness of the maria, the brilliant white of the mountains, and the peppering of tiny craters down to the limit of visibility make it a feast for the senses that is very satisfying! Solar prominences, faculae, ...
mission of the European Space Agency (ESA) and the National Aeronautics and Space Administration (NASA), was launched from the space shuttle on October, 1990 to explore the Sun. It will study the sun's magnetism, solar wind plasma, solar prominences, ...
 See also: Time, Light, Second, Field, Period
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