Scientists Map the Sun’s Alfvén Surface for the First Time #Sun Scientists have created the first-ever detailed map of the Sun’s Alfvén surface, a critical boundary where the Sun’s magnetic field stops controlling the solar wind. This breakthrough study, published in The Astrophysical Journal Letters, offers new insight into how the Sun’s atmosphere and space weather evolve. Using data from multiple spacecraft, including NASA’s Parker Solar Probe, researchers reconstructed how the shape of the A