Prominence

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prominence

[′präm·ə·nəns]
(astrophysics)
A volume of luminous, predominantly hydrogen gas that appears on the sun above the chromosphere; occurs only in the region of horizontal magnetic fields because these fields support the prominences against solar gravity.

Prominence

 

a luminous formation of incandescent gases visible at the edge of the solar disk. When viewed against the background of the solar disk, prominences appear as dark filaments.