Sunspot AR3500 blasted a M9.8-class solar flare. NASA's Solar Dynamics Observatory captured footage of the flare in multiple ...

Sunspot AR3186 erupted with an X1-class solar flare. NASA's Solar Dynamics Observatory captured the fireworks in multiple ...

T he Sun goes through an 11-year cycle of activity, going from the solar maximum, where it is covered in many sunspots and is ...

This image, captured on December 6, 2010, shows a massive solar filament erupting from the Sun. Nearly a million km long, it was seen by STEREO in extreme ultraviolet light.