Saturday, August 29, 2009
Both STEREO spacecraft observed an eruptive prominence in extreme UV light over several hours from their widely separated perspectives (Aug. 24, 2009) and the event appeared quite different to each.
The comparison helps to illustrate the value of having these two perspectives on the Sun. Prominences are cooler clouds of gas suspended above the Sun by powerful, but unstable magnetic forces. Eruptive prominences, such as this one, erupt and break away.
Check it all out at http://sohowww.nascom.nasa.gov/pickoftheweek/