Do Neptune and Pluto have Rings?

Details Do Neptune and Pluto have Rings? Do Neptune and Pluto have Rings?

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.1086b&link_type=abstract

HST Proposal ID #1086

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Hst Proposal Id #1086

Scientific paper

The origin of planetary ring systems remains unknown. One common property of the known ringed planets--Jupiter, Saturn, and Uranus--is that each possesses a regular satellite system, which would point to a close connection between the formation of rings and satellites. However, the dynamical lifetimes of several important features in Saturn's are short, which would lead to the conclusion that these rings are young. Continuing this line of reasoning, one would conclude that rings are not formed concurrently with planets--perhaps the formation of rings depends on encounters of planets with small bodies, or other random events: ring systems come and go. The discovery of ring systems around Neptune and/or Pluto would shift opinion toward this latter view, while the lack of detectable rings would greatly strengthen their apparent connection with regular satellite systems. The August, 1989 Voyager encounter with Neptune discovered complete rings with shepherd satellites, and perhaps ring arcs around Neptune. We propose to further probe the structure of the system of rings and ring arcs around Neptune, to determine the dynamical processes which could create rings as well as ring arcs, and to search for rings around Pluto. To achieve this, we will use occultations, which are most sensitive to (possibly dark) material clumped into narrow rings. Revision History: Received on RPS 9/1/89; Added to SCCS 9/5/89 Updated to V2 prop. instr.; RPSS V7.2 local & remote - SALM 9/6/89;

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