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Stellification
Stellification is a theoretical process by which a brown dwarf star or Jovian-class planet is turned into a star, or by which the luminosity of dim stars is greatly magnified. Methods Luminosity magnification The fusion reaction of stars is strongly dependent upon temperature. For proton-proton reactions such as found in the Sun, the reaction rate scales with the fourth power of temperature (T4). For other reactions such as the CNO cycle, the proportionality can be as high as T20. Thus, increasing the temperature of the star even a small amount (for example by using reflective solar sails), would create a large increase in power output, resulting in a much higher equilibrium temperature, and therefore luminosity, of the star. Black hole seeding Brown dwarf stars and gas-giant planets do not achieve sustained fusion, as they contain insufficient mass to gravitationally compress the reactants to the degree required to initiate a reaction. If the density of the star or planet could ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Dwarf
Brown dwarfs are substellar objects that have more mass than the biggest gas giant planets, but less than the least massive main sequence, main-sequence stars. Their mass is approximately 13 to 80 Jupiter mass, times that of Jupiter ()not big enough to sustain nuclear fusion of hydrogen into helium in their cores, but massive enough to emit some light and heat from the deuterium fusion, fusion of deuterium (deuterium, 2H). The most massive ones (> ) can lithium burning, fuse lithium (lithium-7, 7Li). Astronomers classify self-luminous objects by Stellar classification#Spectral types, spectral type, a distinction intimately tied to the surface temperature, and brown dwarfs occupy types M (2100–3500 Kelvin, K), L (1300–2100 Kelvin, K), T (600–1300 Kelvin, K), and Y ( 80 ''M''J), which have spectral classes L2 to L6. Spectral class T As GD 165B is the prototype of the L dwarfs, Gliese 229B is the prototype of a second ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kevin J
Kevin is the anglicized form of the Irish masculine given name (; ; ; Latinized as ). It is composed of "dear; noble"; Old Irish and ("birth"; Old Irish ). The variant ''Kevan'' is anglicised from , an Irish diminutive form.''A Dictionary of First Names''. Oxford University Press (2007) s.v. "Kevin". The feminine version of the name is (anglicised as ''Keeva'' or ''Kweeva''). History Kevin of Glendalough, Saint Kevin (d. 618) founded Glendalough abbey in the Kingdom of Leinster in History of Ireland (400–800), 6th-century Ireland. Canonized in 1903, he is one of the patron saints of the Roman Catholic Archdiocese of Dublin, Archdiocese of Dublin. Caomhán of Inisheer, the patron saint of Inisheer, Aran Islands, is properly anglicized Kevan, ''Cavan'' or ''Kevan'', but often also referred to as "Kevin". The name was rarely given before the 20th century. In Ireland an early bearer of the anglicised name was Kevin Izod O'Doherty (1823–1905) a Young Irelander and poli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined and slightly less than one-thousandth the mass of the Sun. Its diameter is 11 times that of Earth and a tenth that of the Sun. Jupiter orbits the Sun at a distance of , with an orbital period of . It is the List of brightest natural objects in the sky, third-brightest natural object in the Earth's night sky, after the Moon and Venus, and has been observed since prehistoric times. Its name derives from that of Jupiter (god), Jupiter, the chief deity of ancient Roman religion. Jupiter was the first of the Sun's planets to form, and its inward migration during the primordial phase of the Solar System affected much of the formation history of the other planets. Jupiter's atmosphere consists of 76% hydrogen and 24% helium by mass, with a denser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Giant
A gas giant is a giant planet composed mainly of hydrogen and helium. Jupiter and Saturn are the gas giants of the Solar System. The term "gas giant" was originally synonymous with "giant planet". However, in the 1990s, it became known that Uranus and Neptune are a distinct class of giant planets composed mainly of heavier volatile substances (referred to as "Volatile (astrogeology)#Planetary science, ices"). For this reason, Uranus and Neptune are often classified in the separate category of ice giants. Jupiter and Saturn consist mostly of hydrogen and helium, with heavier elements making up between 3 and 13 percent of their mass.The Interior of Jupiter, Guillot et al., in ''Jupiter: The Planet, Satellites and Magnetosphere'', Bagenal et al., editors, Cambridge University Press, 2004 They are thought to have an outer layer of compressed molecular hydrogen surrounding a layer of liquid metallic hydrogen, with a molten rocky core inside. The outermost portion of their hydrogen atmo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halo (franchise)
''Halo'' is a military science fiction video game series and media franchise, originally developed by Bungie and currently managed and developed by Halo Studios (previously 343 Industries), part of Microsoft's Xbox Game Studios. The series launched in November 2001 with the first-person shooter video game '' Halo: Combat Evolved'' and its tie-in novel, '' The Fall of Reach''. The latest major installment, '' Halo Infinite'', was released in 2021. Spinoffs include real-time strategy and twin-stick shooter games. Bungie began as a developer of computer games for the Macintosh platform. After the company was acquired by Microsoft in 2000, their in-progress game, which started life as a real-time strategy game, became ''Halo: Combat Evolved'', a first-person shooter exclusive to Microsoft's Xbox video game console. Following the success of ''Halo'', Bungie developed additional ''Halo'' sequels before and after regaining its independence from Microsoft in 2007. Microsoft establi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-replicating Machine
A self-replicating machine is a type of autonomous robot that is capable of reproducing itself autonomously using raw materials found in the environment, thus exhibiting self-replication in a way analogous to that found in nature. The concept of self-replicating machines has been advanced and examined by Homer Jacobson, Edward F. Moore, Freeman Dyson, John von Neumann, Konrad Zuse and in more recent times by K. Eric Drexler in his book on nanotechnology, '' Engines of Creation'' (coining the term clanking replicator for such machines) and by Robert Freitas and Ralph Merkle in their review ''Kinematic Self-Replicating Machines'' which provided the first comprehensive analysis of the entire replicator design space. The future development of such technology is an integral part of several plans involving the mining of moons and asteroid belts for ore and other materials, the creation of lunar factories, and even the construction of solar power satellites in space. The von Neuman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proton Decay
In particle physics, proton decay is a hypothetical form of particle decay in which the proton decays into lighter subatomic particles, such as a neutral pion and a positron. The proton decay hypothesis was first formulated by Andrei Sakharov in 1967. Despite significant experimental effort, proton decay has never been observed. If it does decay via a positron, the proton's half-life is constrained to be at least . According to the Standard Model, the proton, a type of baryon, is stable because baryon number ( quark number) is conserved (under normal circumstances; see ''Chiral anomaly'' for an exception). Therefore, protons will not decay into other particles on their own, because they are the lightest (and therefore least energetic) baryon. Positron emission and electron capture—forms of radioactive decay in which a proton becomes a neutron—are not proton decay, since the proton interacts with other particles within the atom. Some beyond-the-Standard-Model grand unifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Monopole
In particle physics, a magnetic monopole is a hypothetical particle that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). A magnetic monopole would have a net north or south "magnetic charge". Modern interest in the concept stems from high-energy physics, particle theories, notably the grand unified theory, grand unified and superstring theory, superstring theories, which predict their existence. The known elementary particles that have electric charge are electric monopoles. Magnetism in bar magnets and electromagnets is not caused by magnetic monopoles, and indeed, there is no known experimental or observational evidence that magnetic monopoles exist. A magnetic monopole is not necessarily an elementary particle, and models for magnetic monopole production can include (but are not limited to) Spin (physics), spin-0 monopoles or spin-1 massive vector mesons. The term "magnetic monopole" only refers to the nature of the particle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion's Arm
Orion's Arm (also called the Orion's Arm Universe Project, OAUP, or simply OA) is a multi-authored online hard science fiction world-building project, first established in 2000 by M. Alan Kazlev, Donna Malcolm Hirsekorn, Bernd Helfert and Anders Sandberg and further co-authored by many people since. Anyone can contribute articles, stories, artwork, or music to the website. A large mailing list exists, in which members debate aspects of the world they are creating, discussing additions, modifications, issues arising, and work to be done. A computer game and a tabletop role-playing game are being developed by the community, within the OA milieu. There is an ezine for Orion's Arm fiction, art, and commentary, called ''Voices: Future Tense'', add-ons for the Celestia program to displaying Orion's Arm planets, spacecraft and other objects, and additional transhumanist flavored SF illustrations. The first published Orion's Arm book, a collection of five novellas set within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stargate SG-1
''Stargate SG-1'' (often stylized in all caps, or abbreviated ''SG-1'') is a military science fiction Adventure fiction, adventure television series within Metro-Goldwyn-Mayer's Stargate, ''Stargate'' franchise. The show, created by Brad Wright and Jonathan Glassner, is based on the 1994 science fiction film ''Stargate (film), Stargate'' by Dean Devlin and Roland Emmerich. The television series was filmed in and around the city of Vancouver, British Columbia, Canada. The series premiered on Showtime (TV network), Showtime on July 27, 1997, and moved to the Syfy, Sci Fi Channel on June 7, 2002; the series finale aired on Sky1 on March 13, 2007. The series was a ratings success for its first-run broadcasters and in syndication and was particularly popular in Europe and Australia. List of awards and nominations received by Stargate SG-1, ''Stargate SG-1s awards include eight Emmy nominations. It also spawned the animated television series ''Stargate Infinity'', the live-action ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light (novel)
''Light'' is a science fiction novel by M. John Harrison published in 2002. It received the James Tiptree, Jr. Award and a BSFA nomination in 2002, and was shortlisted for the Arthur C. Clarke Award in 2003. ''The Guardian'' ranked ''Light'' #91 in its list of 100 Best Books of the 21st Century. Overview The book centres on the lives of three individuals — the physicist (and serial killer) Michael Kearney, on the verge of a breakthrough in theoretical physics sometime in 1999; Seria Mau Genlicher, the cybernetically altered female pilot of a "K-ship"; and the ex-space pilot and adventurer Ed Chianese. Seria Mau's and Ed's stories take place in the year 2400 AD. The lives of these three individuals are linked in many ways, though most tangibly by the presence of a mysterious creature called The Shrander, who appears in many guises to all three characters throughout the novel (with anagrammatic names of Sandra Shen and Dr. Haends). They are also linked by the Kefahuch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olaf Stapledon
William Olaf Stapledon (10 May 1886 – 6 September 1950) was an English philosopher and author of science fiction.Andy Sawyer, " illiamOlaf Stapledon (1886-1950)", in Bould, Mark, et al, eds. ''Fifty Key Figures in Science Fiction''. New York: Routledge, 2010. (pp. 205–210) .John Kinnaird, "Stapledon,(William) Olaf" in Curtis C. Smith, '' Twentieth-Century Science-Fiction Writers''. Chicago, St. James, 1986. (pp. 693–6). In 2014, he was inducted into the Science Fiction and Fantasy Hall of Fame. Life Stapledon was born in Seacombe, Wallasey, on the Wirral Peninsula in Cheshire, the only son of William Clibbett Stapledon and Emmeline Miller. The first six years of his life were spent with his parents at Port Said, Egypt. He was educated at Abbotsholme School in Derbyshire and Balliol College, Oxford, where he acquired a BA degree in Modern History (Second Class) in 1909, promoted to an MA degree in 1913. After a brief stint as a teacher at Manchester Grammar Schoo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
