Evershed Effect:
British astronomer John Evershed discovered the phenomenon in 1909 while he was working at the Kodaikanal Solar Observatory in India. (The government of India made a postage stamp to celebrate his work — the first-ever stamp to highlight sunspot dynamics.) More than 100 years later researchers still aren’t certain what causes the flows. A leading theory holds that material is being siphoned out of the sunspot through magnetic flux tubes much like a milkshake sucked out of a straw. [Spaceweather.com]
There’s a movie at the link, above.
