Webb Maps Uranus’ Magnetic Field Anomalies

Webb Maps Uranus’ Magnetic Field Anomalies

Feb 21, 2026, 2:31 AM en 13 views

TL;DR

The James Webb Space Telescope has unveiled the three-dimensional structure of Uranus' upper atmosphere, mapping temperature gradients and charged particles affected by its magnetic field. This provides new insights into the energy dynamics on ice giants.

Researchers using the James Webb Space Telescope have successfully mapped Uranus' upper atmosphere in three dimensions, providing unprecedented detail on how temperature and particle densities vary with altitude. Headed by Paola Tiranti from Northumbria University, the team employed Webb's NIRSpec instrument for in-depth observations. The study highlights Uranus' decreasing atmospheric temperature and outlines the chaotic influence of its tilted magnetic field. The data show auroral bands and dark regions that correspond with magnetic fields, enhancing our understanding of ice giants' energy dynamics.

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