The STEREO spacecraft (ahead) sees a huge solar prominence. Credit: NASA

The Sun is coming alive with activity.  At the top of the image you can see what NASA is calling the biggest prominence eruption in 15 years.  The prominence was caught in extreme UV light on April 12 and 13, 2010.  This prominence is about 500,000 miles long.

There is a video taking in about 19 hours available here.