THE LARGEST SUNSPOT OF 2025: A huge sunspot is turning toward Earth, posing a threat for strong geoeffective solar flares. Amateur astronomers monitoring the active region have found an unusual ring of "Ellerman Bombs" exploding around the sunspot's planet-sized cores.
THE CENTENNIAL GLEISSBERG CYCLE: You've heard of the 11-year sunspot cycle. But what about the Centennial Gleissberg Cycle? The Gleissberg Cycle is a slower 100-year modulation of sunspots. New research just published in the journal Space Weather suggests that the Gleissberg Cycle is waking up again, which could make solar cycles for the next 50 years increasingly intense.