Close-up H-alpha image of the sun's chromosphere showing a long dark filament and a bright active region against mottled orange surface texture, with the limb visible in the upper corner.

Serpentine Filament

A long, dark filament of suspended plasma snakes across the chromosphere near an active region, its magnetic channel traced against the mottled orange surface texture in this H-alpha close-up.

Date: 30 March 2022