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.

In recent months, South Africans have witnessed rare and spectacular displays of the Aurora Australis or Southern Lights.

The sun has somewhat surprised forecasters today with a dramatic X-class solar flare from a newly emerging sunspot region. The intense solar flare originated from sunspot region AR4046 and was ...

but a particularly large sunspot named AR2781 produced a C5-class solar flare which is a medium-sized explosion even for the Sun. Flares range from A, B, C, M, and X with a zero to nine scale in ...