Coronal mass ejection as viewed by the Solar Dynamics Observatory on June 7, 2011
The sun unleashed a powerful Class X1.5 solar flare on March 9, 2011, a solar storm that could supercharge Earth's auroras. The flare was recorded by NASA's Solar Dynamics Observatory and other spacecraft. Here, it appears in white at the upper right of the sun as seen by the Solar Dynamics Observatory.
The SOHO spacecraft watched as a fairly bright comet dove towards the sun in a white streak and was not seen again after its close encounter (May 10-11, 2011). The comet, probably part of the Kreutz family of comets, was discovered by amateur astronomer Sergey Shurpakov.
The STEREO (Ahead) spacecraft caught a large coronal mass ejection as it roared away from the Sun and out into space in the opposite direction from Earth (Feb. 26-28, 2011).
NASA's Solar Dynamics Observatory captured this view of a powerful M3.6 Class solar flare on Feb. 24, 2011 during a 90-minute sun storm. NASA scientists called the display a "monster prominence" that kicked up a huge plasma wave.
The image of the powerful Class X2 solar flare of Feb. 14, 2011, shows how it appeared to both the Solar Dynamics Observatory in extreme ultraviolet light (center sun disk) and the SOHO's C2 coronagraph. This was the largest flare in more than four years.
A full-disk multiwavelength extreme ultraviolet image of the sun taken by SDO on March 30, 2010. False colors trace different gas temperatures. Reds are relatively cool (about 60,000 Kelvin, or 107,540 F); blues and greens are hotter.