Rings of Uranus: Proposed Model Is Unworkable
نویسندگان
چکیده
منابع مشابه
The Rings of Uranus: Shepherded, or Not?
I investigate the hypothesis that small, unseen moons are “shepherding” the main rings of Uranus. The ring edges are expected to be confined at the discrete locations of Lindblad resonances, where the moon’s influence produces a wavy edge. For a narrow, optically thick ring, this interaction manifests itself as a periodic variation in the ring’s brightness. Under many circumstances, the induced...
متن کاملinvestigating the feasibility of a proposed model for geometric design of deployable arch structures
deployable scissor type structures are composed of the so-called scissor-like elements (sles), which are connected to each other at an intermediate point through a pivotal connection and allow them to be folded into a compact bundle for storage or transport. several sles are connected to each other in order to form units with regular polygonal plan views. the sides and radii of the polygons are...
The dark side of the rings of Uranus.
The rings of Uranus are oriented edge-on to Earth in 2007 for the first time since their 1977 discovery. This event provides a rare opportunity to observe their dark (unlit) side, where dense rings darken to near invisibility, but faint rings become much brighter. We present a ground-based infrared image of the unlit side of the rings that shows that the system has changed dramatically since pr...
متن کاملThe Origin of the Eccentricities of the Rings of Uranus
We consider the effect of gravitational perturbations from a nearby satellite on the eccentricity e of a narrow particulate ring. The perturbations near a resonance in an eccentric ring may be divided into corotation and Lindblad terms. For small e, the corotation terms da,np e, whereas the Lindblad terms excite e. In the absence of saturation the corotation terms win by. a small margin, and e ...
متن کاملNear-Infrared Spectrophotometry of the Satellites and Rings of Uranus
New spectrophotometry from 1.5 to 2.5 /zm is reported for the Uranian satellites Titania, Oberon, and Umbriel. A spectrum of the rings of Uranus from 2.0 to 2.4/zm is also reported. No evidence is found for frost covering the surface of the ring material, consistent with the low albedo of the rings (P~ = 0.03) previously reported by Nicholson and Jones (1980). The surfaces of the satellites are...
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ژورنال
عنوان ژورنال: Science
سال: 1980
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.208.4444.627