Rings, braids and wobbling orbits | Helder, M. 1990.
CS Dialogue 17(3):6-7. CELD ID 13541Abstract As discussed in the summer issue of Dailogue (Vol. 17 no. 2), the unmanned satellites, Voyagers I and II, discovered many unstable conditions among the four outer planets: Jupiter, Saturn, Uranus and Neptune. That is, they discovered certain conditions which could not have continued indefinitely and are therefore short term phenomena. The most prominent of the unstable situations are the planetary rings. Those around Saturn were recognized as a problem even before the visit of the Voyagers. Now rings have been discovered around all four of these planets and each system presents great obstacles to explanations which presuppose billions of years.
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