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A starship, starcraft or interstellar spacecraft is a theoretical spacecraft designed for traveling between stars, as opposed to a vehicle designed for orbital spaceflight or interplanetary travel. The term is mostly found in science fiction, because such craft have never been constructed though some credit the word being first used in the Oahspe bible (1882)〔http://gailallen.com/rel/Oahspe/index.htm〕〔(Oahspe Book of Divinity 16:14 )〕 Whilst the Voyager and Pioneer probes have travelled into local interstellar space, the purpose of these unmanned craft was specifically interplanetary and they are not predicted to reach another star system (although Voyager 1 will travel to within 1.7 light years of AC +79 3888 in approximately 40,000 years〔(【引用サイトリンク】title=Voyager 1 Has Date with a Star in 40,000 Years )〕). Several preliminary designs for starships have been undertaken through exploratory engineering, using feasibility studies with modern technology or technology thought likely to be available in the near future. ==Research== To travel between stars in a reasonable time using rocket-like technology requires very high effective exhaust velocity jet, and enormous energy to power this, such as might be provided by fusion power or antimatter. There are very few scientific studies that investigate the issues in building a starship. Some examples of this include: *Project Orion (1958–1965), mostly manned interplanetary spacecraft *Project Daedalus (1973–1978), unmanned interstellar probe *Project Longshot (1987–1988), unmanned interstellar probe *Project Icarus (2009–2014), unmanned interstellar probe *Hundred-Year Starship (2011), manned interstellar craft *See interstellar probes, interstellar travel The Bussard ramjet is an idea to use nuclear fusion of interstellar gas to provide propulsion. Examined in an October 1973 issue of ''Analog'', the Enzmann Starship proposed using a 12,000 ton ball of frozen deuterium to power thermonuclear powered pulse propulsion units.〔(Enzmann Starship )〕 Twice as long as the Empire State Building and assembled in-orbit, the proposed spacecraft would be part of a larger project preceded by interstellar probes and telescopic observation of target star systems.〔〔(【引用サイトリンク】title=A Note on the Enzmann Starship )〕 The NASA Breakthrough Propulsion Physics Program (1996–2002), was a professional scientific study examining advanced spacecraft propulsion systems. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「starship」の詳細全文を読む スポンサード リンク
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