When the James Webb Space Telescope finally turned its infrared eye toward Uranus, scientists expected to see a frozen, featureless ice giant. What they found changed everything we thought we knew about the seventh planet.
For nearly forty years, our entire understanding of Uranus came from a single six-hour flyby by Voyager 2 in 1986 - and a bombshell 2024 study revealed that flyby happened during a rare solar wind event that distorted the data. We have been working with flawed information for decades.
Now JWST has captured Uranus in ways no telescope ever has. Rings invisible for centuries suddenly blazed with detail. A glowing polar cap revealed active weather no model predicted. And when astronomers mapped the upper atmosphere in three dimensions for the first time using the NIRSpec instrument, they discovered auroras shaped by the strangest magnetic field in the solar system - and confirmed that Uranus has been mysteriously cooling for thirty years with no explanation.
