Filament

Astronomical Dictionary

A strand of (relatively) cool gas suspended over the Sun (or star) by magnetic fields, which appears dark against the disc of the Sun. A filament on the limb of the Sun seen in emission against the dark sky is called a solar prominence.

 
Astronomical [1] [2] [3] [4] [5] [6] [7] [8] [9]

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Astronomical Dictionary
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