The sun flares up
In this photo taken by NASA's Solar Dynamics Observatory, the Sun unleashes a solar flare (at middle right) with a spectacular coronal mass ejection (CME) on June 7.
After being released, the large cloud of particles mushroomed up and fell back down looking as if it covered an area of almost half the solar surface.
The SDO recorded these images in extreme ultraviolet light that show a very large eruption of cool gas. It is somewhat unique because at many places in the eruption there seems to be even cooler material — at temperatures less than 80,000 K.