Overview
- Researchers published a peer-reviewed paper in The Astrophysical Journal Letters that reports the first direct detection of a reversal in the sense of magnetic-field rotation inside solar-wind turbulence.
- The result is based on high-precision magnetic and particle measurements from NASA’s Parker Solar Probe and was reported in October 2026, with the journal article appearing on October 9th.
- At larger, fluid-like scales the magnetic fluctuations preferentially rotate counterclockwise when viewed radially away from the Sun, and at smaller, particle-scale wavelengths the rotation flips to clockwise.
- The wavelength where the reversal occurs grows and shifts to longer scales as the plasma moves farther from the Sun, showing an organized spectral feature at the magnetohydrodynamic-to-kinetic interface.
- The multinational team led by Technische Universität Braunschweig and the University of Tokyo says the discovery sharpens basic plasma physics and may inform space-weather models, but it does not immediately improve operational forecasting.