Andrew Coates
Space scientist at University College London (UCL) Mullard Space Science Laboratory; co-author of the April 2026 Nature Communications paper led by yan-xu showing that saturn’s magnetic cusp sits in the afternoon sector rather than at noon, and that the asymmetry is driven by Saturn’s rapid rotation combined with enceladus-supplied plasma.
Coates framed the result as critical evidence that the rapid spin of massive planets with active moons replaces the solar wind as the dominant force shaping their magnetospheres — aligning Saturn with Jupiter as a rotation-dominated regime and casting Earth’s solar-wind-dominated magnetosphere as a special case. (src-cassini-huygens-ocean-worlds-2026-04)