Word: ring
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Dates: during 2000-2009
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Other images show that the moving moons cause equally graceful formations within the rings by tugging on particles and causing them to pile up and thin out, pile up and thin out, rippling outward in what ring scientists call a density wave. Another kind of wave known as a bending wave is caused by a moon that orbits at an angle inclined to the ring plane, warping or corrugating the ring's edge...
What so moved her and the other scientists was the complexity and dynamism of the rings' internal structures. Scientists have known since Voyager that the seven broad bands that make up the ring system are not undifferentiated masses of material but rather are made up of hundreds of individual strands, like the grooves in a record album. The strands are made up of billions of bits of rubble and ice, some of them crystals smaller than a grain of sand, some of them boulders bigger than a house...
...pictures from Cassini reveal, the interaction of this orbiting material can create bizarre effects. The edge of one ring shows elegant scalloping, presumably caused by the gravitational wake of a moon cruising alongside it. As the moon sails by at predictable intervals, the random collisions of ring particles become more rhythmic, forming tidy peaks and troughs...
...mandate, is both internationally legitimate and objectively fair. It's difficult to imagine the authorities in Belgrade conducting a similarly unbiased prosecution, or one that so carefully protects Milosevic's right to defend himself and even cross-examine victims of his alleged crimes. Milosevic's protestations of unfairness ring hollow. Saddam's allegations of political bias resonate more deeply. The Iraqi Special Tribunal is not an international court. It was created - and its judges selected - by the U.S.-appointed Iraqi Governing Council. Salem Chalabi, the nephew of the once omnipresent opposition figure Ahmad Chalabi, was handpicked by former U.S. administrator...
...CICLOPS: Cassini Imagining Central Laboratory For Operations View special release close-up images of Saturn's ring after Cassini slipped into the planet's orbit...