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Although we refer to the photosphere as a layer of the Sun, in actuality it is a part of the Sun's atmosphere. It is a very thin layer in comparison with the rest of the Sun, and is the only part of the Sun that we can actually see when looking at it from Earth, because the photosphere is where the light is emitted.
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solar-heliospheric.engin.umich.edu/hjenning/Photosphere...
solar-heliospheric.engin.umich.edu/hjenning/Photosphere.html
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In our Sun, as in other stars, roughly 99.9% or so of all light emitted is emitted in a thin layer known as the photosphere, or light sphere. This is explained as follows. ... Think of a piece of hot, glowing charcoal...where does the emitted light you see come from? (Answer: a very thin layer at its surface)
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homepages.wmich.edu/~korista/photosphere.html
homepages.wmich.edu/~korista/photosphere.html
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Because it is a fairly thin region, and the Sun is quite far away, the photosphere appears to be a very sharp surface, and gives the illusion of an actual ...
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cseligman.com/text/sun/sun.htm
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Sun - Wikipedia, the free encyclopedia
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The Sun is the star at the center of the Solar System. The Earth and other matter (including other planets, asteroids, meteoroids, comets, and dust) orbit the Sun, which by itself accounts for about...
en.wikipedia.org/wiki/Sun
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etrated into the corona, either because of diffusion of magnetic ... perstrong electric currents ($1010 A kmÀ2) inside very thin layers ...
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www.bbso.njit.edu/~avi/Abramenko-ApJ681.pdf
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in the sun extending to very great depths. In particular, there is a very thin layer, lying just a few scale heights below the photosphere, ...
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www.jstor.org/stable/74599
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(a) most of the visible light comes from the narrow corona ; (b) the Sun's surface is solid ; (C) the photosphere is very thin compared to the Sun's radius ; (d) the chromosphere emits no visible light ; (e) the photosphere has granulated structure ; ... (a) because there is very little interstellar gas ;
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casa.colorado.edu/~skinners/ast1020_syll/exam1_spr99_so...
casa.colorado.edu/~skinners/ast1020_syll/exam1_spr99_solns.html
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the temperature in the chromosphere increases with height above the photosphere. ... observations during eclipses reveal a very extensive photosphere. ... the H- ion is a very good absorber of photons and causes the gas of the photosphere to be opaque.
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tigre.ucr.edu/dipen/astro/ch8/ch8.htm
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Although local helioseismology (e.g. Zhao 2004) is a very promising method, it is still in progress and until now does not provide enough reliable results. Since the photosphere is a very thin layer (0.04% of the solar radius), the large-scale photospheric velocity fields have to be almost horizontal.
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svanda.astronomie.cz/publikace/pub14.pdf
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