This <a href="https://en.wikipedia.org/wiki/Solar_Dynamics_Observatory#Atmospheric_Imaging_Assembly" class="extiw" title="en:Solar Dynamics Observatory">AIA</a> (<i>Atmospheric Imaging Assembly</i>) video shows a close-up view of a <a href="https://en.wikipedia.org/wiki/coronal_mass_ejection" class="extiw" title="en:coronal mass ejection">filament launch</a>, in a wavelength band that is centered around 304 <a href="https://en.wikipedia.org/wiki/%C3%85ngstr%C3%B6m" class="extiw" title="en:Ångström">Ångström</a>. This extreme ultraviolet emission line is from singly ionized <a href="https://en.wikipedia.org/wiki/Helium" class="extiw" title="en:Helium">Helium</a>, or He II, and corresponds to a temperature of approx. 50,000 degrees Celsius.
NASA/Goddard Space Flight Center Scientific Visualization Studio
2010-03-24
<ul><li><a rel="nofollow" class="external free" href="http://svs.gsfc.nasa.gov/goto?3715">http://svs.gsfc.nasa.gov/goto?3715</a></li>
<li>Converted to OGG/Theora from the original <a rel="nofollow" class="external text" href="http://svs.gsfc.nasa.gov/vis/a000000/a003700/a003717/frames/1280x720_16x9_30p/">TIFF frames</a> at 30 fps.</li></ul>