Webb Finds Signs of Patchy Water Clouds on Coldest Known Brown Dwarf

Oct 9, 2026 - 15:00
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Webb Finds Signs of Patchy Water Clouds on Coldest Known Brown Dwarf
This artist's conception shows W0855, the coldest known brown dwarf. Image credit: NASA / JPL-Caltech / Penn State University.

Astronomers using the NASA/ESA/CSA James Webb Space Telescope have captured the first time-resolved, medium-resolution spectra of WISE J085510.83-071442.5, an ultracool brown dwarf just 7.4 light-years away, and found that its atmosphere is anything but static.

The post Webb Finds Signs of Patchy Water Clouds on Coldest Known Brown Dwarf appeared first on Sci.News: Breaking Science News.

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