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An orbital ring is a concept of an artificial ring placed around a body and set rotating at such a rate that the apparent centrifugal force is large enough to counteract the force of gravity. For the Earth , the required speed is on the order of 10 km/sec, compared to a typical low Earth orbit velocity of 8 km/sec.
The eye-ring of a bird is a ring of tiny feathers that surrounds the orbital ring, [5] a ring of bare skin immediately surrounding a bird's eye. [5] [6] The eye-ring is often decorative, and its colour may contrast with adjoining plumage. [4] The ring of feathers is sometimes incomplete, forming an eye arc.
In orbital mechanics, the geostationary ring is the region of space around the Earth that includes geostationary orbits and the volume of space which can be reached by uncontrolled objects which begin in geostationary orbits and are subsequently perturbed. [1]
A Bishop Ring [1] is a type of hypothetical rotating space habitat originally proposed in 1997 by Forrest Bishop of the Institute of Atomic-Scale Engineering. [2] The concept is a smaller scale version of the Banks Orbital , which itself is a smaller version of the Niven ring . [ 3 ]
An orbital ring is a dynamically elevated ring placed around the Earth that rotates at an angular rate that is faster than orbital velocity at that altitude, stationary platforms can be supported by the excess centripetal acceleration of the super-orbiting ring (similar in principle to a Launch loop), and ground-tethers can be supported from ...
A ring system is a disc or torus orbiting an astronomical object that is composed of solid material such as gas, dust, meteoroids, planetoids or moonlets and stellar objects. Ring systems are best known as planetary rings, common components of satellite systems around giant planets such as of Saturn, or circumplanetary disks.
The F Ring is the outermost discrete ring of Saturn and perhaps the most active ring in the Solar System, with features changing on a timescale of hours. [133] It is located 3,000 km (2000 miles) beyond the outer edge of the A ring. [134] The ring was discovered in 1979 by the Pioneer 11 imaging team. [80]
Due to their gravitational influence, shepherd moons deflect ring particles from their original orbits due to proximity or through orbital resonances. This can carve gaps in the ring system, such as the Encke Gap maintained by Saturn's moon Pan, or lead to the confining of narrow ringlets, such as Saturn's F ring.