Earlier this week, the number of visible sunspots on our home star fell to zero for the first time in 1,335 days. This ...

Solar Cycle 25 has reached its most active phase, bringing stronger solar flares and geomagnetic storms that may affect Earth’s technology.

Skies over Southern Europe, the central United States and parts of Asia glowed with the Northern and Southern Lights, and for a short time, even India joined that list. But behind the beauty lay ...