Sunspot AR3842 erupted with an X2-class solar flare In Oct. The same sunspot blasted X9 and X7 flares in the last week.

Unpredictable solar activity is causing satellites to fall to Earth. Intense solar phenomena have contributed to the ...

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

when Richard Carrington documented a pivotal solar flare. Dubbed the Carrington Event, the flare challenged perceptions of ...

Unexpected solar activity caused Binar satellites to re-enter early, illustrating challenges of solar weather in low orbit.

Sunspots captured astronomers' interest, and with the expanding availability and quality of telescopes, were closely tracked until 1645. Despite huge interest in them, astronomers could find no ...