New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring

Details New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...312...92d&link_type=abstract

Science, Volume 312, Issue 5770, pp. 92-94 (2006).

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Scientific paper

We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced by impacts into the embedded moon Mab, which apparently orbits at a location where nongravitational perturbations favor the survival and spreading of submicron-sized dust. R/2003 U 2 more closely resembles Saturn's G ring, which is red, a typical color for dusty rings.

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