Uranus's two outer rings show starkly different origins

Apr 17, 2026 - 20:22
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Uranus's two outer rings show starkly different origins
Astronomers using the W. M. Keck Observatory on Maunakea, Hawaiʻi Island are revealing new insight into the composition and origins of Uranus's two outer rings. Using data from the Keck Observatory Archive (KOA), combined with observations taken by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST), researchers constructed the first complete reflectance spectrum (sunlight reflected off the rings) of the μ and ν rings, confirming their colors and uncovering their detailed composition.

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