Parker Solar Probe Uncovers Source of Fast Solar Wind.

NASA's Parker Solar Probe has detected the origin and structure of the solar wind close to the sun's surface, revealing details that are lost as the wind exits the corona as a uniform blast of charged particles. The probe has detected streams of high-energy particles that match the supergranulation flows within coronal holes, which suggests that these are the regions where the so-called "fast" solar wind originates. Understanding how and where the solar wind originates will help predict solar storms that can wreak havoc with satellites and the electrical grid.