solar filament


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solar filament

n.
A solar prominence seen in silhouette against the brighter photosphere of the sun.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
WASHINGTON (CyHAN)- A dark solar filament above the sun's surface became unstable and erupted on Dec.
The video, captured by from NASA's Solar Dynamics Observatory (SDO), shows a very long, whip-like solar filament extending over half a million miles in a long arc above the sun's surface, the Daily Mail reported.
Known as a solar filament, threads of plasma have burst out from the sun's super-hot outer atmosphere and can have effects on Earth.