Send to

Choose Destination
Science. 2006 Feb 17;311(5763):973-7. Epub 2005 Dec 22.

The second ring-moon system of Uranus: discovery and dynamics.

Author information

SETI Institute, 515 North Whisman Road, Mountain View, CA 94043, USA.


Deep exposures of Uranus taken with the Hubble Space Telescope reveal two small moons and two faint rings. All of them orbit outside of Uranus's previously known (main) ring system but are interior to the large, classical moons. The outer new moon, U XXVI Mab, orbits at roughly twice the radius of the main rings and shares its orbit with a dust ring. The second moon, U XXVII Cupid, orbits just interior to the satellite Belinda. A second ring falls between the orbits of Portia and Rosalind, in a region with no known source bodies. Collectively, these constitute a densely packed, rapidly varying, and possibly unstable dynamical system.

Comment in

Free full text

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center