AI Insight
NASA researchers detected an unusually persistent solar radio burst that lasted approximately 19 days, far exceeding the typical duration of such events, which normally span a few hours to several days. The signal was tracked using multiple spacecraft positioned across the solar system, allowing scientists to triangulate its origin. The source was identified as a helmet streamer, a large magnetic structure in the Sun's outer atmosphere known to form at the boundaries between regions of opposite magnetic polarity.
Why it matters
Understanding the mechanisms behind prolonged solar radio bursts could improve space weather forecasting, which has direct implications for protecting satellites, power grids, and communication systems from solar activity. This finding also challenges existing models of solar magnetic behavior and may prompt revisions in how scientists categorize and predict solar radio events.
NASA scientists were stunned when a strange radio signal from the Sun refused to fade away. Instead of lasting a few hours or days like normal solar radio bursts, this one persisted for an astonishing 19 days — shattering the previous record. Using a fleet of spacecraft spread across the solar system, researchers tracked the mysterious signal to a massive magnetic structure on the Sun called a helmet streamer.
Source: NASA stunned as strange solar radio burst lasts 19 days