Sunspot AR3229 erupted with an X2-class solar flare. NASA's Solar Dynamics Observatory captured the fireworks in multiple ...

Sunspot AR3767 erupted with a X1.7-class solar flare, followed by an X1.1-class flare from sunspot AR3780. NASA's Solar ...

Solar flares heat ions much more strongly than electrons. The finding offers a new explanation for spectral line broadening.

AP photographer Dmitri Lovetsky had been trying to photograph a plane flying across the disk of the sun for several days.

New research shows that solar flares are six times hotter than thought and calls for updated sun models that could improve ...