Two other types were also defined by Paul Birch: In addition, he proposed the concept of "supramundane worlds" such as supra-Jovian and supra-stellar "planets". On opposite sides of the ring are two large deep saltwater oceans, placed in counterbalance to one another. In the game Xenoblade Chronicles 2 there is a giant tree that has grown around the base of an Orbital Ring. Orbital rings are used extensively in the collaborative fiction worldbuilding website Orion's Arm.[10]. When the velocity of the string exceeds 10 km/sec, centrifugal forces detach the string from the Earth's surface and lift the ring into space. But there’s a … Thus, large thrusters must be incorporated into the design to keep it centered about its star. The "Other Ocean" has many maps of a single world: the Pak Homeworld. The tensile strength of scrith is similar to the strong nuclear force, with the Ringworld foundation only about 30m (100 ft) deep. Other science fiction authors have devised their own variants of Niven's Ringworld, notably Iain M. Banks' Culture Orbitals, best described as miniature Ringworlds, and the ring-shaped Halo structure of the video game series of the same name. Paul Birch, "Orbital Ring Systems and Jacob's Ladders - III". In the simplest design of an orbital ring system, a rotating cable or possibly an inflatable space structure is placed in a low Earth orbit above the equator. It is true that we have a cloud of debris in orbit, mostly organized into a low earth orbit shell and a ring around and above geosynchronous orbit. https://larryniven.fandom.com/wiki/Ringworld?oldid=5570, G3 verging on G2; "barely smaller and cooler than, 7.5 Ringworld days (225 hours, 9.375 Earth days), On Ringworld, time longer than a day is measured in. Saturn and its spectacular rings, as imaged by the Hubble Space Telescope on July 4, 2020. Arthur C. Clarke's 3001: The Final Odyssey (1997) features an orbital ring held aloft by four enormous inhabitable towers (assumed successors to space elevators) at the Equator. Our planet has one moon, while Mercury and Venus have none and all … By an array of elevators and several geostationary ring stations, asteroid or Moon material can be received and gently put down where land fills are needed. In Niven's Ringworld novels, the material—which he calls scrith—is said to have been artificially produced through the transmutation of matter into the required substance. The Moonis slowly moving away from Earth, ge… Earth's moon is also visible to the left of our planet in a cropped, zoomed-in version of the image (Figure 1). The electric energy generated in the process would pay for the system expansion and ultimately could pave the way for a solar-system-wide terraforming and astroengineering activity on a sound economical basis. https://www.jpl.nasa.gov/images/earth-between-the-rings-of-saturn Also, a whole network of orbital rings can be built, which, by crossing over the poles, could cover the whole planet and be capable of taking over most freight and passenger transport. Earth Planet Earth as of 100000 CE, the rings were built in 13728 CE to celebrate Vega becoming the new North Star. This is not the perfect match for a planet however, as there is no sunrise or sunset in Ringworld, and when not covered by a shadow square, the sun is always at high noon. The planet Medusa also has such a ring, called Telstarax, hailing from the Dark Age of Technology, but it is largely plundered and wrecked. The third part of Neal Stephenson's book Seveneves has an orbital ring around a moon-less earth. Walls 1000 miles tall along the edges retain the atmosphere. A detailed description of the concept was proposed and analyzed by Paul Birch in 1982, proposing a massive ring that would encircle the globe in low orbit, from which cables hang down to the Earth's surface.[3][4][5]. An asteroid or comet would have to venture very close to the Earth to be torn apart by tidal forces and form a ring around the Earth. In the fourth book in the series, Ringworld's Children, he creates backplot explanations for several of the imperfections in his original design of the Ringworld — and wholly glosses over others, such as that Louis Wu is worried about his dietary intake of salt since only the Great Oceans are described as being saline. Orbital debris, or “space junk,” is any man-made object in orbit around the Earth that no longer serves a useful purpose. The cables which dangle from the ring are now geostationary without having to reach geostationary altitude, or without having to be placed into the equatorial plane. Niven himself thinks of the Ringworld as "an intermediate step between Dyson spheres and planets.". A ringworld design requires active stabilization, because it is not in inertial orbit. What if Earth had rings? It also absorbs nearly 100% of all other radiation and subatomic particles and rapidly dissipates heat. If Earth were the size of a nickel, the Moon would be about as big as a coffee bean. Including both diamond , gemstone , and classic metal bands, our timeless wedding rings for men are the perfect symbol of the love you share. The Earth was formed approximately 4.54 billion years ago and is the only known planet to support life. Ringworld has a habitable flat inner surface equivalent in area to approximately three million Earth-sized planets. A. Meulenberg and P. S. Karthik Balaji, "The LEO Archipelago: A system of earth-rings for communications, mass-transport to space, solar power, and control of global warming", Journal of the British Interplanetary Society, "Nonlinear Dynamics of Ringworld Systems", "Orbital Ring Systems and Jacob's Ladders - I-III", MegaStructures 01: Orbital Rings & Space Elevators, String Transport Systems: on Earth and in space, https://en.wikipedia.org/w/index.php?title=Orbital_ring&oldid=991493266, Creative Commons Attribution-ShareAlike License, Eccentric orbital ring systems – these are rings that are in the form of a closed shape with varying altitude, This page was last edited on 30 November 2020, at 10:17. A simple unsupported hoop about a planet (or a star) is unstable: it would crash into the central body if left unattended. https://serc.carleton.edu/introgeo/earthsystem/nutshell/space.html This ring effectively provides near unlimited power to earth. Once it reaches the Roche Limit of the Earth, about 9,500 km, our planet’s gravity will tear the Moon apart into a ring. Our own moon is a very safe 236,000 miles (380,000 km) away. In the ring-satellite cycle model, satellites form from the outer edge of the ring, and then migrate outward through gravitational interaction with the ring. The researchers spotted the ring unexpectedly while they were mapping the distribution of dark matter within the galaxy cluster Cl 0024+17 (ZwCl 0024+1652), located 5 billion light-years from Earth. These absorb a huge amount of sunlight energy, which is beamed to the Ringworld as its primary source of power. Later in the series the ring also shows space stations mounted on its surface. That means 30 Earth-sized planets could fit in between Earth and the Moon. It is primarily used as a shipyard for interstellar craft. With a radius of 1,079.6 miles (1,737.5 kilometers), the Moon is less than a third the width of Earth. In fact, the earth did once have a ring—as part of the formation of our moon, ironically enough. Paul Birch, "Orbital Ring Systems and Jacob's Ladders - II". Take your favorite fandoms with you and never miss a beat. This means that using the Orbital Ring concept, one or many pairs of Stations can be positioned above any points on Earth desired, or can be moved everywhere on the globe. In Ringworld's Children it is additionally explained that it took the reaction mass of roughly 20 Jupiter masses to spin up the ring; thus the combined mass of the planets of the original system was that much larger than our solar system's. If built by launching the necessary materials from Earth, the cost for the system estimated by Birch in 1980s money was around $31 billion (for a "bootstrap" system intended to expand to 1000 times its initial size over the following year, which would otherwise cost 31 trillion dollars) if launched using Shuttle-derived hardware, whereas it could fall to $15 billion with space-based manufacturing, assuming a large orbital manufacturing facility is available to provide the initial 180,000 tons of steel, aluminum, and slag at a low cost, and even lower with orbital rings around the Moon. The anime Mobile Suit Gundam 00 also prominently features an orbital ring, which consists primarily of linked solar panels. [1][2] The orbital ring concept requires a method of stabilizing the ring. The ring is connected to earth via three space elevators. The Ringworld is an artificial world with a surface area three million times larger than Earth's, built in the shape of a giant ring-shaped ribbon a million miles wide and with a diameter of 186 million miles. These rings are connected to large towers extending from the planets surface. Although this simple model would work best above the equator, Paul Birch calculated that since the ring station can be used to accelerate the orbital ring eastwards as well as hold the tether, it is therefore possible to deliberately cause the orbital ring to precess around the Earth instead of staying fixed in space while the Earth rotates beneath it. Men's Wedding Bands & Rings View our broad selection of men's wedding bands in styles ranging from classic to unique designs. One of the large oceans, known as the "Great Ocean", contains one-to-one maps of all of the inhabited worlds of known space. It is the largest man made structure in the galaxy. Earth's moon is 2,159 miles (3,474 km) wide, about one-fourth of Earth's diameter. It rotates, providing an artificial gravity equivalent to 99.2% of Earth's gravity by way of Centrifugal force. Hanging down from these ring stations are short elevator cables made from materials with high-tensile-strength-to-mass-ratio. Recently in Destroyer of Worlds (novel) it was revealed that by combining aspects of the Pak building material twing, itself an incredibly durable programmable substance, with the theory of resonant molecule bonds could produce something akin to Scrith. See the moon's shadow on Earth from the 'ring ... - Space.com https://www.nationalgeographic.com/science/space/solar-system/earth The majority of the surface is land interspersed with shallow, freshwater seas. Due to its enormous strength, scrith is impervious to most weapons. The second iteration of the anime series Tekkaman features a complete ring, though abandoned and in disrepair due to war, and without surface tethers. The Moonis an average of 238,855 miles (384,400 kilometers) away. The Moon is farther away from Earth than most people realize. A new image from NASA's Cassini spacecraft shows planet Earth as a point of light between the icy rings of Saturn. The Ringworld is an artificial world with a surface area three million times larger than Earth's, built in the shape of a giant ring-shaped ribbon a million miles wide and with a diameter of 186 million miles. The structure is intended to be used as a space station or as a planetary vehicle for very high speed transportation or space launch. The manga Battle Angel Alita (1990-1995) prominently features a slightly deteriorated orbital ring. This point gave Niven some difficulty after he published his first Ringworld novel; he was deluged with letters pointing out that "the Ringworld isn't stable" and dedicated the first sequel to a resolution of this problem. Andrew Meulenberg and his students, from 2008 to 2011, presented and published a number of papers based on types and applications of low-Earth-orbital rings as humanity's "stepping-stones-to-space". Though the ring itself is rotating at 1200 km/s (to approximate Earth gravity), the center of mass is stationary — in fact, it is at an unstable equilibrium, roughly comparable to a small sphere balanced on top of a larger one. https://www.space.com/what-if-earth-had-rings.html?utm_campaign=meetedgar&utm_medium=social&utm_source=meetedgar.com https://www.damninteresting.com/earths-artificial-ring-project-west-ford The opening battle of Star Wars: The Clone Wars's Season 6 pilot takes place on some form of ring-shaped orbital space station surrounding the planet of Ringo Vinda. The adventurers surmised that its construction consumed literally all the planets in that system, down to the last asteroid and/or moon, as the Ringworld star has no other bodies in orbit. To provide an approximation of the day–night cycle common to planets, Ringworld was also provided with a separate ring of "shadow squares" linked together (by "shadow square wires") in a ring close to the star, rotating at slightly faster than the Ringworld's spin, providing a lot of twilight, as well as a day-night cycle. Scrith is a milky-gray translucent, nearly frictionless material. In this first sequel, he also tackled how to prevent all the soil from ending up in the oceans. Most notably as both Scrith and Twing can be reshaped to pass through thanks to a softening device (Pak) or a cziltang brone per the Ringworld. If such a structure were built it could indeed provide a huge habitable inner surface, but the energy required to construct it and set it rotating is so significant (several centuries' worth of the total energy output from the Sun) that without as-yet unimagined energy sources becoming available, it is hard to see how this construction could ever be possible in a time frame acceptable to humans. Anatoly Yunitskiy, "в космос на колесе" ("To Space by Wheel"). Scrith is said to have been artificially produced through the transmutation of matter. The game X3 Terran Conflict features a free-floating orbital ring around the Earth, which is shattered by an explosion and subsequently de-orbited in X3: Albion Prelude. Sort of. As revealed in Ringworld Engineers, the "shadow squares" also provide a shielding to the inner surface of the Ringworld when someone in the control room uses a magnetic field embedded in the Ringworld to fire the meteor defense system. 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