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1 July 20265 min read
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A team using NASA's James Webb Space Telescope identified a previously unknown moon orbiting Uranus, expanding the planet's known satellite family to 29.
NASA said the detection came from Webb NIRCam observations taken on 2 February 2025. The object was faint enough to have escaped earlier observations, including Voyager 2's 1986 flyby.
The discovery shows how Webb's infrared sensitivity can revise the inventory of nearby planetary systems, not only observe the distant universe.
NASA cautioned that the finding was science in progress and had not yet completed peer review.
Why It Matters
New moons and ring-system details help planetary scientists reconstruct how outer-planet systems formed and evolved.
What to Watch
Watch naming, orbital refinement and follow-up observations from Webb and ground-based telescopes.
Primary Sources
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Topics
James Webb Space TelescopeUranusPlanetary ScienceAstronomy