SMRTR Science & EngineeringApr 22, 2026Nautilus

The Origins of Uranus’ Distant Rings Hint at a Hidden Moon

SMRTR summary

Using data from the Keck Observatory, Hubble, and James Webb telescopes, scientists completed the first detailed analysis of Uranus' two outermost rings. One ring appears to be icy debris from the moon Mab, while the other contains rocky, organic material — possibly stirred up by an undiscovered hidden moon.

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