All of it.
We can now see the entire sun.
On Feb. 6th, NASA’s twin STEREO probes moved into position on opposite sides of the sun, and they are now beaming back uninterrupted images of the entire star—front and back.
“For the first time ever, we can watch solar activity in its full 3-dimensional glory,” says Angelos Vourlidas, a member of the STEREO science team at the Naval Research Lab in Washington, DC.
NASA released a ‘first light’ 3D movie on, naturally, Super Bowl Sun–day:
Link has more details, and very cool video.
Update: And here: BBC News – Stereo satellites move either side of Sun; Wired.com