The 2012 Venus transit as seen in the 171 Å wavelength, imaged by the <a href="https://en.wikipedia.org/wiki/Solar_Dynamics_Observatory" class="extiw" title="w:Solar Dynamics Observatory">Solar Dynamics Observatory</a>. This channel is especially good at showing coronal loops - the arcs extending off of the Sun where plasma moves along magnetic field lines. The brightest spots seen here are locations where the magnetic field near the surface is exceptionally strong.
NASA/Solar Dynamics Observatory
<a rel="nofollow" class="external free" href="https://www.youtube.com/watch?v=QX6BbP1wAIs">https://www.youtube.com/watch?v=QX6BbP1wAIs</a>