First 3-D Stereo from STEREO: EUVI 171 Ångstroms (South Pole View)
This movie shows the south pole of the Sun from the two STEREO spacecraft using the 171 Ångstrom filter in the Extreme UltraViolet Imager (EUVI). This filter reveals ionized iron (Fe+8=Fe IX, Fe+9=Fe X) which forms at temperatures above 1.3x106K, and flows along the magnetic field lines of the solar active regions. New active regions come into view as the Sun rotates.