Most of us think of the Sun as a bright and featurless disk. Spacecraft and telescopes use special filters to study our star, revealing new phenomena.

http://sohowww.nascom.nasa.gov/
The latest images, archived images and movies and events observed using the SOHO spacecraft.

http://vestige.lmsal.com/TRACE/Public/Gallery/Images/
TRACE image gallery

http://antwrp.gsfc.nasa.gov/apod/ap970918.html
On August 27, 1997 twisting magnetic fields propelled this huge eruptive prominence a 100,000 miles above the Sun's surface.