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The Smallest Moon Ever Discovered

Why Uranus Is The Most Unique Planet

Astronomers using NASA’s James Webb Space Telescope have discovered a tiny new moon orbiting Uranus, the first addition to the ice giant’s satellite family in decades. Provisionally named S/2025 U1 , the hidden moon was first detected on February 2, 2025, and at just 10 kilometers (six miles) wide it is the smallest moon yet found around Uranus and the smallest in our solar system!

Although the discovery was made months ago, it was only just announced that Uranus now has a 29th known moon. I reached out to Dr. Matthew Tiscareno , a planetary scientist at the SETI Institute in Mountain View, California, who explained, "It takes time to do careful analysis and be very sure of such a momentous announ

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