posted on Apr, 27 2007 @ 10:50 AM
NASA has some wonderful movies on their site that show the sun's activity.
This page is for the STEREO project:
STEREO Science Objectives:
* Understand the causes and mechanisms of coronal mass ejection (CME) initiation.
* Characterize the propagation of CMEs through the heliosphere.
* Discover the mechanisms and sites of energetic particle acceleration in the low corona and the interplanetary medium.
* Improve the determination of the structure of the ambient solar wind.