solar filament

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.

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References in periodicals archive

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.

Radiation from astonishing 'solar whip' heading for earth

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.

AWESUN; Flare stretches 435,000 miles

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