Orbital ring - Wikipedia
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 …
Will we ever… build ringworlds? - BBC
2015年6月9日 · Huge ring-shaped worlds orbiting distant stars have become an iconic image of science fiction. Their pristine landscape, contained within a thin, ring-like structure, has tantalised our...
Cosmic Megastructures - Could We Build a Ringworld? - Popular Mechanics
2014年9月4日 · A Niven Ring, then, can be thought of as the slice of the habitat-friendly section of a Dyson Sphere. To get Earth-like gravity, the Ringworld would need to spin at nearly three million miles...
Mass-Stream Technology (Space Fountains and Orbital Rings)
2001年12月12日 · An orbital ring, suspended 100km above the world Wegener Using accelerated streams of projectiles or particles to either transfer momentum or support a large structure. The transfer of momentum by the use of massive particles is a technique which is widely used in the Terragen Sphere, both in the Beamrider Network and boosteam launch systems ...
The Ringworld: A Megastructure of Impossibility and Imagination
2024年5月28日 · Introduced in his 1970 award-winning novel of the same name, the Ringworld is an artificial band approximately one million miles wide and roughly the diameter of Earth's orbit around the sun. This awe-inspiring construct possesses a habitable inner…
Top 10 Theoretical Megastructures - Listverse
2010年3月7日 · The Alderson disk (named after Dan Alderson, its originator) is an artificial astronomical megastructure, like Niven’s Ringworld or a Dyson sphere. The disk is a giant platter, like a CD or phonograph record, with a thickness of several thousand miles.
Orbital Rings: the Wholly Grail of Megastructures - Greg School
2018年9月1日 · Orbital rings also allow you to build artificial planets and Dyson spheres, which would allow us to completely colonize the solar system. They would also allow us to build a Birch planet, a single planet with a surface area which exceeds the total surface area of all the planets in the Milky Way galaxy.
Encyclopedia Galactica - Artificial Planets - Orion's Arm
2008年9月3日 · In order to assemble such a world without high-energy impacts, a very large framework of elliptical dynamic orbital rings is constructed around the growing world. Incoming matter is brought to rendezvous with the outermost edges of the rings, and decelerated as it passes along the rings towards the surface.
Megastructures - discoverscifi.com
2020年12月31日 · An orbital ring is a theoretical, ring-shaped structure that orbits around a central point. The inner surface of the ring provides living area. If the ring is large enough, living space is quite ample, greatly surpassing the surface area of Earth. Cities, forests, fields, lakes—they can all fit on the inner surface of the ring.
Orion's Arm - Encyclopedia Galactica - Ringworlds
2013年3月26日 · A ringworld is a ring-like megastructure that completely encircles its star. The star is continually overhead when seen from the surface of such a structure. A day-night cycle, if desired, can be provided by sunshades of various kinds.