NASA's Solar Dynamics Observatory captured sunspot AR3386 blast a long-duration X1.6-class solar flare and X1 flare. See time ...

Sunspot AR3738 erupted with a X2-class solar flare. Watch the blast in multiple wavelengths from NASA's Solar Dynamics Observatory. Footage courtesy: NASA / SDO and the AIA, EVE, and HMI science teams ...

T Coronae Borealis (T CrB), popularly known as the "Blaze Star," is surely on the verge of a rare and dramatic brightening.

A new look at an ancient eruption at Campi Flegrei raises new questions about the propensity of the still-active volcano, ...