Sun's 19-Day Radio Burst Sets New Record, Tracked Across the Solar System
NASA and international spacecraft tracked a 19-day Type IV solar radio burst—the longest ever observed—originating from a helmet streamer in the Sun's outer atmosphere. The event, likely powered by a sequence of three coronal mass ejections, kept electrons trapped and replenished, extending radio emissions well beyond typical durations. Observations from Parker Solar Probe, Solar Orbiter, STEREO, and Wind allowed near-continuous monitoring as the Sun rotated, offering new insights for forecasting space weather and understanding large-scale solar magnetic structures.