← Science’s Looming ‘Tipping Point’

Penumbral Filament

By | Published November 18, 2012 | Full size is 284 × 190 pixels

A penumbral filament is a semi-transparent tornadic plasma discharge. Where the filament current density is high it brightens to form moving striations. The darker core is visible only at favorable angles of the filament axis to the observer.

Bookmark the permalink.