One of my favorite Web sites is the STEREO (Solar Terrestrial Relations Observatory) site. It has some great movies of solar activity, which is now -- thankfully for everyone who thought they understood how the Sun worked -- picking up. The STEREO movies show flares, prominences, Coronal Mass Ejections (CMEs), self-immolating comets, even what they called a "solar tsunami" shock wave -- all amazing things to see for something that is normally too bright for us to look at.
Here are three good ones.
Solar tsunami
"Valentine" Flare (February 12, 2010)
Curling, Twirling Prominence
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