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An H-alpha image taken by the Big
Bear Solar Observatory. H-alpha is a particular part of the
visible spectrum: one of the spectral lines produced by hydrogen.
H-alpha light is produced in the chromosphere,
above the surface of the sun, so it provides us with a clearer picture
of activity above the solar surface. Filaments
and prominences
are both seen more clearly in H-alpha, while sunspots are somewhat
visible. |
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