Astronomers just spotted a tiny new moon lurking in Uranus’s orbit. The James Webb Space Telescope clocked this barely visible satellite, named S/2025 U1, during a scan on February 2.

At just 6 miles across, it would only take you a couple of hours to walk across it. This faint little rock was so dim and distant that even Voyager 2, the legendary spacecraft that first flew past Uranus in 1986, didn’t catch it.

S/2025 U1 brings Uranus’s known moon count to 29, and scientists suspect there are many more microscopic satellites still waiting to be found. The moon’s orbit, about 35,000 miles from the planet’s center, places it right on the edge of Uranus’s inner rings, a chaotic cosmic wasteland where moons and ring debris intermingle.

Scientists Just Found a New Moon Orbiting Uranus

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