Photosphere
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Photosphere
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The intensely bright portion of the sun visible to the unaided eye.
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The photosphere is that portion of the sun's atmosphere which emits the
continuum radiation upon which the Fraunhofer
lines are superimposed. In one sun model, the photosphere is thought to be
below the reversing layer in which Fraunhofer absorption takes place. In
another model, all strata are considered equally effective in producing
continuous emissions and line absorption.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use