Reports

Uranus: The Rings Are Black

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Science  04 Nov 1977:
Vol. 198, Issue 4316, pp. 503-504
DOI: 10.1126/science.198.4316.503

Abstract

An upper limit of 0.05 is established for the geometric albedo of the newly discovered rings of Uranus. In view of this very low albedo, the particles of the rings cannot be ice-covered as are those of rings A and B of Saturn.