When I wrote this "Quick Study" on Weakened Magnetic Braking for @physicstoday.bsky.social in 2018, we already had the physical picture largely correct – we just didn't have all of the evidence in hand to support it. Now we do. physicstoday.aip.org/quick-study/...
Old Sun-like stars observed by the Kepler Space Telescope spin faster than astronomers expected. Apparently, they experience a dramatic shift in their rotation and magnetism at about middle age.
