NASA
SDO watched as an active region in the Sun’s southern hemisphere produced a whole series of looping arcs of plasma in profile.
When NASA launched the Solar Dynamics Observatory (SDO) February 11, 2010, it made possible some of the best-ever solar observations. This 19-second video shows a series of looping arcs of plasma in an active region of the Sun’s southern hemisphere, from September 11 to 13, 2010.
