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prominence at HighBeam Research
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You can see the prominence form, rise up, and then erupt away into space over the course of one day, on October 6-7, 2012. Sometimes this material rains back down to the surface, and sometimes it escapes entirely.

A prominence is a large bright feature extending outward from the Sun's surface, often in a loop configuration. Prominences are anchored to the Sun's surface in the photosphere, and extend outwards into the Sun's corona.

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.
Return to the StarChild Main Page ...

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. They can extend for 2x105 kilometers.

Introduction to the Sun Solar Structure Size, Mass Flares, Solar Wind, ~s Sun's Birth Solar Eclipses Activities,
Web Links Solar Rotation Sunspots Sun's Death
Solar Flares, ~s, the Solar Wind, and Coronal Mass Ejections

~ is a structure in the Sun's corona consisting of cool plasma supported by magnetic fields. ~s are bright structures when seen over the solar limb, but appear dark when seen against the bright solar disk. ~s seen on the disk also are known as filaments.

~ - A solar ~ is an cloud-like arc of gas that erupts from the surface of the Sun.
Guide to Amateur Astronomy, Planets and Constellations ...

~ 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.

~ -- a large-scale gaseous formation above the surface of the Sun.
regression -- the movement of points in an orbit in the direction opposite from the motion of the orbiting body. For example, the Moon travels from west to east, but its nodes are regressing from east to west.

~: Complex structures of relatively cool, dense solar material that extend into the outer chromosphere and inner corona. They are generally static and believed to be supported by magnetic forces. They can appear as loops on the edge of the solar disk or limb.

~. 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.

~, 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
Protoplanet- a stage in the formation of a planet which implies the body is nearly full-size ...

~ - Structure that occurs above the photosphere of the Sun. ~s may reach high into the corona, often as graceful loops that may hang suspended for many days.

A looping column of gas ejected from the surface of the Sun.
The initial stage of planetary formation. A protoplanet is a small clump of material that may accumulate material to become a planet.

Eruptions of the solar surface. Visible during total solar eclipses.
Proper Motion ...

an explosion of hot gas that erupts from the Sun's surface. Solar ~s are usually associated with sunspot activity and can cause interference with communications on Earth due to their electromagnetic effects on the atmosphere.

~s. 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.
Proton. An atomic particle, part of the nucleus, that has a positive electrical charge.

A feature of the lower part of the solar corona which when observed in the red line of hydrogen at 653nm (Ha), look like flames leaping up from the surface of the Sun. In fact they are cool (10,000ēK) dense condensations in the bottom layer of the corona.

~ - A region of cool gas embedded in the corona. ~s are bright when seen above the Sun's limb, but appear as dark filaments when seen against the Sun's disk ...

~ A cloud of cooler plasma extending high above the Sun"s visible surface, rising above the photosphere into the corona.
Propeller pitch--the angle at which the propeller blade (or part of it) "bites" into the air, its angle of attack.

A region of cool (104 K), high-density gas embedded in the hot (106 K), low-density Solar corona. ~s are the flamelike tongues of gas that appear above the limb of the Sun.
Propagator ...

Rise to ~
Alcibiades first rose to ~ when he began advocating aggressive Athenian action after the signing of the Peace of Nicias
Peace of Nicias ...

~s are dense clouds of material suspended above the surface of the Sun by loops of magnetic field. ~s and filaments are actually the same things except that ~s are seen projecting out above the limb, or edge, of the Sun.

An eruption of gas from the chromosphere of a star. Solar ~s are visible as part of the corona during a total solar eclipse.

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.

~ - (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. ~s are at approximately the same temperature as the chromosphere.
proper motion - (n.) ...

A ~ 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 ~ 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]
Fine Structure ...

A solar ~ as seen by SOHO. Image credit: Solar and Heliospheric Observatory (SOHO). SOHO is a project of international cooperation between ESA and NASA.

Finally, solar ~s 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.

~ A filamentlike protuberance from the chromosphere of the sun. See flocculi. Compare flare.

ACTIVE ~ A ~ displaying material motion and changes in appearance over a few minutes of time. ACTIVE REGION (AR) A localized, transient volume of the solar atmosphere in which PLAGEs, SUNSPOTS, FACULAe, FLAREs, etc. may be observed.

solar ~ (NASA Thesaurus) Filamentlike protuberances from the chromosphere of the sun. Used for filaments (solar physics). solar ~ (NASA SP-7, 1965) = ~. solar protons (NASA SP-7, 1965) Protons emitted by the sun, especially during solar flares.

prism ~ proper motion angular change of a star's direction from the Sun in one year. protein large molecule composed of hundreds to thousands of amino acids joined together by peptide links making up the DNA molecule.

A rather twisted ~. Both images courtesy of SOHO/EIT consortium. SOHO is a project of international cooperation between ESA and NASA.

If I can see solar ~s with the naked eye during a total eclipse, why do I need a hydrogen-alpha filter to see them at other times? During a total eclipse the Moon completely blocks the Sun's photosphere, or visible 'surface,' allowing ~s (and the corona) to shine in all their glory.

The corona is not visible and neither are the ~ because of the glare from the photosphere.
Rock of aluminum and calcium silicates found in the lunar highlands.
Point in the earth's orbit where the earth is farthest away from the Sun (summer for us)
Apogee ...

An ACTIVE ~ 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 ~.

farrum pancake-like 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 ~.

" So great is its ~ that it has two "announcer stars" that from the mid- northern hemisphere rise before it, Procyon and Mirzam. Famed from times long past, the first glimpse of Sirius in dawn announced the rising of the Nile in ancient Egypt.

The Yerkes (or Morgan) scheme uses strictly the relative ~ 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 ~ of sunspots: dark cool regions on the Sun that are a mere 3,000 C, compared to the average 6,000 C surface temperature.

Solar flares are eruptions more powerful than surge ~s (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.

Solar Heliospheric Observatory Image Showing ~s
Solar Flares
Solar flares are explosive events on the solar surface characterized by intense brightening of regions of the solar atmosphere in x-rays, ultraviolet and visible light over periods of a few minutes, ...

He initiated in 1866 the spectroscopic observation of sunspots, and in 1868 he found that solar ~s are upheavals in a layer around the Sun, which he named the chromosphere.

The Sun's faint corona will be visible, and even the chromosphere, solar ~s, and possibly even a solar flare may be visible.

Sir Patrick Moore CBE was an English astronomer who attained ~ as a writer, researcher, and presenter of ‘The Sky At Night,' the world's longest-running television series with the same original presenter.

ACTIVE PERIOD - Lots of solar activity including sunspots, flares, ~s, 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 ...

M17 - Very bright nebula, elongated shape. The northern part is almost straight, in the south I can see a small ~.
M8 - Diffuse light surrounding a grouping of stars. Easily seen with averted vision.
M20 - Very difficult. Diffuse light surrounding a star.

~s 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.

Southern Cross
A small but very distinctive . The Southern Cross inspired many ancient cultures because of it ~ in the night sky. The VLT third Unit Telescope is named after the Southern Cross in the Mapuche language, "Melipal".

Sunspot cycle, magnetic field cycle, differential rotation
~s, 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 ~ of scientific enquiry in Europe at the time of ...

"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 ~s, faculae, and what looks to me like cat hair on the Sun.

With a good white-light solar filter, you can track sunspots, faculae, and granulation. If you can afford a scope with a hydrogen-alpha filter, you'll see the fiery orange photosphere and immense ~s flying off the edge of the solar disk. An incredible sight.

It is immediately obvious that the above images show the sun as being very different at the three wavelengths. By combining the information obtained from the three images astronomers can study many aspects of the sun, the sunspots, the solar flares and ~s and all the other kinds of ...

The Ulysses spacecraft, a joint 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 ~s, ...

The Coalsack earned the nickname Black Magellanic Cloud in the 16th century, apparently rivalling the ~ of the Large and Small Magellanic Clouds, the two dwarf irregular galaxies that shine brightly in the skies of the Southern Hemisphere.

gather light with an objective lens at one end and focus the light at the eyepiece at the other end. Refractors were almost extinct at one point, but modern glass elements (including an exciting new artificially grown crystal known as fluorite) have brought the refractor back to ~.

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 ~s and flares around the limb of the Moon, even without a telescope (see image at left).

Examples include ~s, 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. All these contribute to solar activity which is tied in somehow with the sunspot cycle.

See also: See also: What is the meaning of Earth, Sun, Astro, Solar, Power?

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