Fri June 3, 2011
NPR Story

Probing The Sun's Spots

Reporting in the journal Science, Göran Scharmer, of the Royal Swedish Academy of Sciences, and colleagues looked closely at the stringy penumbra region of a sunspot using the Swedish Solar Telescope. Sunspots form by magnetic fields interacting with boiling hot plasma — but exactly how the plasma flows in the penumbra region wasn't well understood.