by APOD Robot » Tue Mar 04, 2014 5:13 am
Sun and Prominence
Explanation: Dramatic
prominences can sometimes be seen looming just beyond the edge of the sun. Such was the case last week as a large prominence,
visible above, highlighted a highly active recent Sun. A waving
sea of hot gas is visible in the foreground chromosphere in great detail as it was imaged in one
specific color of light emitted by hydrogen. A
solar prominence is a cloud of solar gas held just above the surface by the
Sun's magnetic field. The
Earth, illustrated in the inset, is smaller than the
prominence. Although very hot, prominences typically
appear dark when viewed against the
Sun, since they are slightly cooler than the
photosphere below them. A
quiescent prominence typically lasts about a month, and may
erupt in a
Coronal Mass Ejection (CME) expelling hot gas into the
Solar System, some of which may strike the Earth and trigger
auroras.
[/b]
[url=http://apod.nasa.gov/apod/ap140304.html][img]http://apod.nasa.gov/apod/calendar/S_140304.jpg[/img] [size=150]Sun and Prominence[/size][/url]
[b] Explanation: [/b] Dramatic [url=http://csep10.phys.utk.edu/astr162/lect/sun/prominences.html]prominences[/url] can sometimes be seen looming just beyond the edge of the sun. Such was the case last week as a large prominence, [url=http://www.astrosurf.com/ubb/Forum3/HTML/040215.html]visible above[/url], highlighted a highly active recent Sun. A waving [url=http://apod.nasa.gov/apod/ap081102.html]sea of hot gas[/url] is visible in the foreground chromosphere in great detail as it was imaged in one [url=http://en.wikipedia.org/wiki/Hydrogen_Alpha]specific color[/url] of light emitted by hydrogen. A [url=http://solar.physics.montana.edu/YPOP/Program/hfilament.html]solar prominence[/url] is a cloud of solar gas held just above the surface by the [url=http://csep10.phys.utk.edu/astr162/lect/sun/magnetic.html]Sun's magnetic field[/url]. The [url=http://apod.nasa.gov/apod/ap070325.html]Earth[/url], illustrated in the inset, is smaller than the [url=http://apod.nasa.gov/apod/ap030223.html]prominence[/url]. Although very hot, prominences typically [url=http://apod.nasa.gov/apod/ap010129.html]appear dark[/url] when viewed against the [url=http://en.wikipedia.org/wiki/Sun]Sun[/url], since they are slightly cooler than the [url=http://solarscience.msfc.nasa.gov/surface.shtml]photosphere[/url] below them. A [url=http://apod.nasa.gov/apod/ap970127.html]quiescent prominence[/url] typically lasts about a month, and may [url=http://apod.nasa.gov/apod/ap110307.html]erupt[/url] in a [url=http://solarscience.msfc.nasa.gov/CMEs.shtml]Coronal Mass Ejection[/url] (CME) expelling hot gas into the [url=http://csep10.phys.utk.edu/astr161/lect/solarsys/scale.html]Solar System[/url], some of which may strike the Earth and trigger [url=http://apod.nasa.gov/apod/ap110517.html]auroras[/url].
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