The Rings of Uranus (The Uranus Trilogy Book 2)

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The current measurments for the A to D rings — these are the most visible ones — come up with a width for the complex of around thousand Km. D ring is the closest the the planet and A is the furthest out. The thickness of each rings varys but they really are astonishingly thin. The C and B rings are both meters thick and the A ring is meteres thick. To put this in perspective… if the rings were a sheet of copier paper thickness of.

The Keck images are impressive. I like that a lot. Better than the pee sounding one. LaRoche limit — 2. The larger your diameter as a planet, the wider presumably the zone in which you can have a stable ring. The top one is apparently caused by looking through the thickest part of the rings. You can see it on both sides in the same position in the full image. The other one appears at the limb and seems to be the effect of brightness multiplying, the brightness of the ring added to the brightness of the planet. Below that there appears a slight variation that could just be noise.

You know, they discovered a new body recently. It apparently used to orbit Mars, but was somehow ripped away. The results might surprise you! Yes, analemas for other planets have been computed. Gee, I wonder if the Uranians would compute that as a direct statement from Eternity??? They may well swallow entire terrestrial, earth-like planets as they encounter them starting to coalesce in the inner reaches of their planetary systems and you can only imagine that this would make it hard for rings to form and persist!

Think I read this somewhere. Hmm … Three years late to this party! I just found out now so i came on this website to check it. You can look at it on google earth click this planet icon on the top then click sky then type in uranus and you should be able to see the ring. So I found ou n google earth.

By Phil Plait August 23, August 23, at August 23, at 1: That smelloscope joke can be found on Youtube here: August 23, at 2: So, are rings regular companions of gas giants? Mark Martin I appreciate your explanation and the numbers involved. Uranus gets a bum deal hee hee It is secretly my favourite planet. August 23, at 3: August 23, at 4: Ah yes, that Futurama joke was one of the best. I laughed very loud at it. I always liked the planet Uranus myself.

The Rings of Uranus

August 23, at 5: I use a similar pronounciation to your idea; GaterNate. In Indonesia we pronounced it oo-RUN-oos.

No anal jokes there! August 23, at 6: August 23, at 7: Yes, Yes, very cool indeed. August 23, at 9: Remember the voyager2 images?! What a difference 20 years makes…. August 24, at 2: August 24, at 5: Bumhole pronounced B-yoom-hole-EE … August 24, at 6: August 24, at 8: Anyone up for a trip to the cool blue planet? GAry 7 August 24, at 8: Hmm, still no sign of Klingons. August 24, at 9: I was just looking for some comment on the actual post itself.

Uranus, its rings and Moons - Voyager 2

August 24, at MC, More current data, as always, supplants older data. August 24, at 1: Stark, More recent data, gotcha. August 24, at 3: August 25, at 6: Elwood, Yes, analemas for other planets have been computed. GAry 7 August 25, at 2: Selina Morse asked waay back on August 23rd, at 2: April 6, at 8: So I found ou n google earth June 14, at October 8, at 5: If the planet is phonetically oo-ra- noos?

Are the inhabitants still Urainian? February 18, at Discover's Newsletter Sign up to get the latest science news delivered weekly right to your inbox! See More Recent Categories Archives. Carl Sagan Day Moon bounce Uwingu wants you to submit names for their planetary baby book Getting closer: Super-Earth found in a star's habitable zone Back to work.

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The discovery of these outer rings doubled the known radius of the ring system. As currently understood, the ring system of Uranus comprises thirteen distinct rings. In order of increasing distance from the planet they are: The rings are made of an extremely dark material. The chemical composition of the ring particles is not known. They cannot be made of pure water ice like the rings of Saturn because they are too dark, darker than the inner moons of Uranus. The nature of this material is not clear, but it may be organic compounds considerably darkened by the charged particle irradiation from the Uranian magnetosphere.

The rings' particles may consist of a heavily processed material which was initially similar to that of the inner moons. As a whole, the ring system of Uranus is unlike either the faint dusty rings of Jupiter or the broad and complex rings of Saturn , some of which are composed of very bright material—water ice. Indeed, occultation observations conducted from the ground and the spacecraft showed that its normal optical depth [c] varies between 0.

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This happened in when a ring plane-crossing was observed. Such strong scattering requires the existence of a coherent structure. Its orbital inclination is almost zero.

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The narrow component even vanishes in some places. Rings 6, 5 and 4 are the innermost and dimmest of Uranus's narrow rings. The equivalent depth is as high as 0. In Voyager 2 detected a broad and faint sheet of material inward of ring 6. It was visible only in a single Voyager 2 image. In —, the Hubble Space Telescope detected a pair of previously unknown rings, now called the outer ring system, which brought the number of known Uranian rings to Their peak normal optical depths are 8. The resulting equivalent optical depths are 0. The rings have triangular radial brightness profiles.

In this geometry the rings are much brighter, which indicates that they contain much micrometer-sized dust. An outstanding problem concerning the physics governing the narrow Uranian rings is their confinement. Without some mechanism to hold their particles together, the rings would quickly spread out radially.

The shepherds thus keep ring particles in place, but gradually move away from the ring themselves. Since the rings of Uranus appear to be young, they must be continuously renewed by the collisional fragmentation of larger bodies. The lifetime of a smaller satellite is much shorter.


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The end product of such a disruptive evolution would be a system of narrow rings. A few moonlets must still be embedded within the rings at present. The origin of the dust bands is less problematic.

Rings of Uranus - Wikipedia

The dust has a very short lifetime, — years, and should be continuously replenished by collisions between larger ring particles, moonlets and meteoroids from outside the Uranian system. The main rings have more centimeter to meter-sized bodies. Such a distribution increases the surface area of the material in the rings, leading to high optical density in back-scattered light. The rings were thoroughly investigated by the Voyager 2 spacecraft in January Rings were studied by analyzing results of radio, [22] ultraviolet [26] and optical occultations.

This table summarizes the properties of the planetary ring system of Uranus. From Wikipedia, the free encyclopedia. It assumes values from zero to infinity.

The normal optical depth of the U2R ring was taken from de Smith et al. Retrieved 23 January International Astronomical Union, Circular No. Results from 10 April Occultations". Reports on Progress in Physics. Results from Voyager 2".