Parker Solar Probe solves mystery of fast solar wind source.

NASA's Parker Solar Probe has identified the source of the "fast" solar wind, which can disrupt communication and power infrastructure and pose a threat to satellites, spacecraft and even astronauts. The spacecraft tracked the solar wind back to its origin, "coronal holes" in the sun's atmosphere, and found that the streams of high-energy particles that make up the solar wind match so-called "supergranulation flows" within these holes. This discovery could aid the prediction of potentially disruptive solar storms.