Why Does Saturn’s Magnetosphere Rotate Differently from Its Interior?
Mahtab A Quddusi (noreply@blogger.com)
Summary Saturn’s deep interior spins with a period near 10h 33m (± ~1–2 min) as inferred from Cassini gravity and ring seismology data. Its magnetosphere, a giant rotating plasma bubble, shows different “days”: Cassini found northern Saturn Kilometric Radiation (SKR) ~10h 36m and southern SKR ~10h 48m. These periods vary seasonally. The mismatch arises because external factors (plasma from Enceladus and rings, the solar wind, ionospheric coupling) slow or modulate the magnetospheric plasma, so i