One of the most spectacular coronal mass ejections from the Sun ever captured by NASA's SDO spacecraft.
Credit: NASA/SDO
Widescreen 4K version on Youtube: https://www.youtube.com/watch?v=1NkQmnuCsGM
The CME shown was captured by NASA's SDO spacecraft on Aug 31, 2012. The CME was not aimed directly at Earth, but did connect with Earth's magnetosphere, causing spectacular auroras on the night of Sep 3, like this one captured over Whitehorse, Yukon by David Cartier, Sr.
Source: https://www.nasa.gov/mission_pages/sunearth/news/News090412-filament.html
What is the CME?