Spacecraft and telescopes use special filters to study our star, revealing new phenomena.

http://www.lmsal.com/YPOP/Classroom/Lessons/Filters/
"Do you see what I see?": a lesson about the astronomical imaging, how to build a color wheel, and online activities seeing the Crab Nebula at different wavelengths.

http://sohowww.nascom.nasa.gov/data/latestimages.html
Latest Solar Images: the most current images from SOHO.

http://www.lmsal.com/YPOP/ProjectionRoom/latest.html
Yohkoh Public Outreach: the latest image of the Sun, taken from the Soft X-ray Telescope on board Yohkoh.