Uranus: The Rings Are Black

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


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.