JWST maps Uranus’s auroras and tilted magnetosphere in unprecedented detail

JWST mapped Uranus's upper atmosphere during a ~15-hour rotation, revealing two bright auroral belts around the planet's magnetic poles and a mid-latitude depletion region, along with a three-dimensional view of ion temperature and density up to about 5,000 km above the cloud tops. The data show Uranus’s highly tilted magnetosphere drives distinctive auroral patterns and that the atmosphere has cooled since the 1990s, offering clues about ice giants and exoplanet atmospheres.