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In celestial mechanics, the term stationary orbit refers to an orbit around a planet or moon where the orbiting satellite or spacecraft remains orbiting over the same spot on the surface. From the ground, the satellite would appear to be standing still, hovering above the surface in the same spot, day after day. The stationary-orbit region of space is known as the Clarke Belt, named after British science fiction writer Arthur C. Clarke, who published the idea in Wireless World magazine in 1945. A stationary orbit is sometimes referred to as a "fixed orbit".

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  • Fiksa orbito (eo)
  • Stationary orbit (en)
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  • En astronomio, fiksa orbito estas orbito tia, ke la satelito ĉiam situas super la sama punkto de la supraĵo de la ĉefa astro. Ekzemple, veterprognozaj satelitoj bezonas ĉiam observi la saman regionon de Tero, kaj pro tio ili situas en terfiksa orbito. Fiksa orbito estas speciala okazo de samdaŭra orbito, kiu ankaŭ estas samdaŭra kaj ekvatora. (eo)
  • In celestial mechanics, the term stationary orbit refers to an orbit around a planet or moon where the orbiting satellite or spacecraft remains orbiting over the same spot on the surface. From the ground, the satellite would appear to be standing still, hovering above the surface in the same spot, day after day. The stationary-orbit region of space is known as the Clarke Belt, named after British science fiction writer Arthur C. Clarke, who published the idea in Wireless World magazine in 1945. A stationary orbit is sometimes referred to as a "fixed orbit". (en)
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  • En astronomio, fiksa orbito estas orbito tia, ke la satelito ĉiam situas super la sama punkto de la supraĵo de la ĉefa astro. Ekzemple, veterprognozaj satelitoj bezonas ĉiam observi la saman regionon de Tero, kaj pro tio ili situas en terfiksa orbito. Fiksa orbito estas speciala okazo de samdaŭra orbito, kiu ankaŭ estas samdaŭra kaj ekvatora. Estas konate ke, laŭ la gravitleĝoj, ju pli granda la orbitradiuso, des pli granda la orbitperiodo; tial fiksa orbito povas okazi nur je tiu difinita orbitradiuso, ĉe kiu la orbitperiodo hazarde egalas la turniĝperiodon de la ĉefastro. En la praktiko, la orbitrapido de satelitoj emas malrapide malpligrandiĝi, kaj tial longedaŭraj satelitoj de tempo al tempo bezonas puŝon de malgrandaj raketoj por ĝustigi la orbiton. (eo)
  • In celestial mechanics, the term stationary orbit refers to an orbit around a planet or moon where the orbiting satellite or spacecraft remains orbiting over the same spot on the surface. From the ground, the satellite would appear to be standing still, hovering above the surface in the same spot, day after day. In practice, this is accomplished by matching the rotation of the surface below, by reaching a particular altitude where the orbital speed almost matches the rotation below, in an equatorial orbit. As the speed decreases slowly, then an additional boost would be needed to increase the speed back to a matching speed, or a retro-rocket could be fired to slow the speed when too fast. The stationary-orbit region of space is known as the Clarke Belt, named after British science fiction writer Arthur C. Clarke, who published the idea in Wireless World magazine in 1945. A stationary orbit is sometimes referred to as a "fixed orbit". (en)
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