Flaming Horns

Are those devil's horns sprouting from the underside of the sun? Nope, this ultraviolet image snapped by NASA's STEREO space probe reveals twin arcs of super-heated gas, called solar prominences, flung into space by Sol on September 14.

Heated to thousands of degrees, these giant filaments of plasma are twisted into intricate ribbons by the powerful magnetic fields surrounding giant groups of sunspots.