Prominences
Related Category: Astronomy: General
see chromosphere.
More on Prominences
Chromosphere - (kr´msfr´´) [Gr.
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.
Prominences can loop hundreds of thousands of miles into space. Prominences are held above the Sun's surface by strong magnetic fields and can last for many months.
Prominences
Prominences are dense clouds of material suspended above the surface of the Sun by loops of magnetic field.
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.
SOLAR PROMINENCES
Gases trapped at the edge of the Sun which appear to shoot outward from the Sun's surface.
SOLAR SYSTEM
The Sun and all of the planets, comets, etc. which revolve around it.
12. Prominences are large flames erupting from the burning surface of the Sun. (Hint)
13. Positrons are the antiparticles of electrons. (Hint)
14. Nuclei are held together by the strong force. (Hint) ...
Filaments and Prominences
Filaments are dark, thread-like features that are seen in red light (H-α). They are dense, somewhat cooler, clouds of material. They are suspended above the surface of the sun by loops of magnetic fields.
The number of prominences vary with the solar cycle (as is the case with sunspots). They generally drift towards the poles of the sun, where they can form what is known as a polar crown.
The Sun's Magnetic Poles
The anatomy of the Sun ...
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.
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.
A portion of the solar LIMB displaying ACTIVE PROMINENCEs. ACTIVE REGION (AR). A localized, transient volume of the solar atmosphere in which PLAGEs, SUNSPOTS, FACULAe, FLAREs, etc. may be observed. ACTIVE SURGE REGION (ASR).
Filaments are dark structures when seen against the bright solar disk, but appear bright when seen over the solar limb, filaments seen over the limb are also known as prominences.
The corona is the seat of the solar wind Prominences are threads of cool gas that lie in the corona and are supported by magnetic fields. (From Stars, J. B. Kaler, Scientific American Library, Freeman, NY, 1992.)
After 4.
When there are many sunspots visible on the surface of the Sun (at the time of solar maximum), other features such as solar flares and prominences are also visible.
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.
Generated by solar flares or large solar prominences, "coronal transients" (also called coronal mass ejections) are sometimes released.
One feature shown in such pictures are prominences, large clouds of denser and cooler gas, rising high above the photosphere.
Prominences are anchored to the Sun's surface in the photosphere, and extend outwards into the Sun's corona.
Prominences may reach high into the corona, often as graceful loops that may hang suspended for many days.
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.
They are often associated with erupting prominences, and are thought to be caused by an energy release that takes place in the Sun's magnetic field, but is observed in the corona.
He took this instrument to Spain and for the first time was able to photograph solar prominences, which can only be seen during a solar eclipse.
The Sun's faint corona will be visible, and even the chromosphere, solar prominences, and possibly even a solar flare may be visible.
It is in this region that prominences appears. Prominences are immense clouds of glowing gas that erupt from the upper chromosphere. The outer region of the corona stretches far into space and consists of particles traveling slowly away from the Sun.
By watching these ripples spread to larger areas, potentially instigating prominences and coronal mass ejections, ...
Solar prominences are visible as part of the corona during a total solar eclipse.
Prominences are bright structures when seen over the solar limb, but appear dark when seen against the bright solar disk. Prominences seen on the disk also are known as filaments.
Learn more about the Sun: ...
Mass of hot, hydrogen rising from the Sun's chromosphere, best observed indirectly during a total eclipse. Eruptive prominences are violent in force and may reach heights of 2 million km; ...
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 ...
active region: An area on the sun where sunspots, prominences, flares, etc., occur.
adaptive optics: Computer-controlled telescope mirrors that can at least partially compensate for seeing.
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.
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.
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.
The 11- or 22-year cycle with which such solar activity as sunspots, flares, and prominences varies
solar cell - (n.)
A device used for converting sunlight into electricity; a photoelectric cell.
Spectacular loops and prominences are often visible on the Sun's limb (left).
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.
Related category
- SOLAR TOPICS ...
The Sun during its 11-year cycle of activity when spots, flares, prominences, and variations in radiofrequency radiation are at a maximum. [H76]
Activity ...
A solar prominence is an arc of gas that erupts from the surface of the . Prominences can loop hundreds of thousands of miles into space and can last for many months.
SOLAR MINIMUM
A solar minimum is a low level in solar activity (like flares, prominences, sunspots, soronal holes, etc.), and occurs between consecutive solar maxima.
...
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 ...
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 : ...
"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, ...
solar minimum, there are very few sunspots, and those that do appear are located far from the Sun's equator. During the next solar maximum in the year 2001, however, there may be hundreds of sunspots on the Sun at once, and several prominences or ...
At this point the sky is sufficiently dark that planets and brighter stars are visible, and if the Sun is active one can typically see solar prominences and flares around the limb of the Moon, even without a telescope (see image at left).
Examples include prominences, which are great arcs of gas that extend outwards from the Sun, and solar flares which are great explosions and jets of gas from the solar surface.
coronagraph An instrument for photographing the corona and prominences of the sun at times other than at solar eclipse. An occulting disk is used to block out the image of the body of the sun in the focal plane of the objective lens.
 See also: Prominence, Solar, Sun, Corona, Sunspot
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