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science20h ago
Astronomers finally solve Saturn’s decades-long spin mystery
- JWST observations show Saturn's apparent rotation changes are driven by atmospheric winds, not actual spin rate shifts.
- Researchers mapped Saturn’s northern aurora continuously for a full Saturn day to chart temperature and particle densities.
- The study uses infrared signals from the trihydrogen cation to map atmospheric temperature with higher precision.
- The findings describe a self-sustaining planetary heat engine linking aurora, heating, winds, and currents.
- The study links atmospheric heating to the dynamics of Saturn's magnetosphere, suggesting planet-wide interactions.
- Findings imply similar atmospheric-auroral coupling could exist on other planets.
- The JWST study was conducted by Northumbria University and collaborators across the US and UK.
- The research was published in the Journal of Geophysical Research: Space Physics in 2026.
- The study clarifies once and for all that Saturn's measured rotation changes are measurement artifacts.
- This discovery provides a new lens for understanding planetary atmospheres and their interaction with space environments.
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