NASA提出新的概念引擎，据说能达到光速的99%
<p><span word="When">When</span> <span word="it">it</span> <span word="comes">comes</span> <span word="to">to</span> <span word="space">space</span>, <span word="there">there</span>'<span word="s">s</span> <span word="a">a</span> <span word="problem">problem</span> <span word="with">with</span> <span word="our">our</span> <span word="human">human</span> <span word="drive">drive</span> <span word="to">to</span> <span word="go">go</span> <span word="all">all</span> <span word="the">the</span> <span word="places">places</span> <span word="and">and</span> <span word="see">see</span> <span word="all">all</span> <span word="the">the</span> <span word="things">things</span>. <span word="A">A</span> <span word="big">big</span> <span word="problem">problem</span>. <span word="It">It</span>'<span word="s">s</span>, <span word="well">well</span>, <span word="space">space</span>.</p><p>一提到太空，人类想去所有地方看所有事物的欲望就会遇到一个问题，而且是个大问题，那就是“太空”。</p><p><span word="It">It</span>'<span word="s">s</span> <span word="way">way</span> <span word="too">too</span> <span word="big">big</span>. <span word="Even">Even</span> <span word="travelling">travelling</span> <span word="at">at</span> <span word="the">the</span> <span word="maximum">maximum</span> <span word="speed">speed</span> <span word="the">the</span> <span word="Universe">Universe</span> <span word="allows">allows</span>, <span word="it">it</span> <span word="would">would</span> <span word="take">take</span> <span word="us">us</span> <span word="years">years</span> <span word="to">to</span> <span word="reach">reach</span> <span word="our">our</span> <span word="nearest">nearest</span> <span word="neighbouring">neighbouring</span> <span word="star">star</span>.</p><p>太空太大了，即使以宇宙允许的最快速度行驶，我们也要花几年时间才能到达离我们最近的恒星。</p><p><span word="But">But</span> <span word="another">another</span> <span word="human">human</span> <span word="drive">drive</span> <span word="is">is</span> <span word="finding">finding</span> <span word="solutions">solutions</span> <span word="to">to</span> <span word="big">big</span> <span word="problems">problems</span>. <span word="And">And</span> <span word="that">that</span>'<span word="s">s</span> <span word="what">what</span> <span word="NASA">NASA</span> <span word="engineer">engineer</span> <span word="David">David</span> <span word="Burns">Burns</span> <span word="has">has</span> <span word="been">been</span> <span word="doing">doing</span> <span word="in">in</span> <span word="his">his</span> <span word="spare">spare</span> <span word="time">time</span>.</p><p>但人类的另一个欲望是找到解决大问题的办法，<span word="NASA">NASA</span>工程师<span word="David">David</span> <span word="Burns">Burns</span>就一直利用业余时间研究这个。</p><p><span word="He">He</span>'<span word="s">s</span> <span word="produced">produced</span> <span word="an">an</span> <span word="engine">engine</span> <span word="concept">concept</span> <span word="that">that</span>, <span word="he">he</span> <span word="says">says</span>, <span word="could">could</span> <span word="theoretically">theoretically</span> <span word="accelerate">accelerate</span> <span word="to">to</span> 99 <span word="percent">percent</span> <span word="of">of</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="light">light</span> - <span word="all">all</span> <span word="without">without</span> <span word="using">using</span> <span word="propellant">propellant</span>.</p><p>他提出了一个引擎概念，他说理论上可以加速到光速的99%，而且完全不用推进剂。</p><p><span word="He">He</span>'<span word="s">s</span> <span word="posted">posted</span> <span word="it">it</span> <span word="to">to</span> <span word="the">the</span> <span word="NASA">NASA</span> <span word="Technical">Technical</span> <span word="Reports">Reports</span> <span word="Server">Server</span> <span word="under">under</span> <span word="the">the</span> <span word="heading">heading</span> "<span word="Helical">Helical</span> <span word="Engine">Engine</span>", <span word="and">and</span>, <span word="on">on</span> <span word="paper">paper</span>, <span word="it">it</span> <span word="works">works</span> <span word="by">by</span> <span word="exploiting">exploiting</span> <span word="the">the</span> <span word="way">way</span> <span word="mass">mass</span> <span word="can">can</span> <span word="change">change</span> <span word="at">at</span> <span word="relativistic">relativistic</span> <span word="speeds">speeds</span> - <span word="those">those</span> <span word="close">close</span> <span word="to">to</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="light">light</span> <span word="in">in</span> <span word="a">a</span> <span word="vacuum">vacuum</span>. <span word="It">It</span> <span word="has">has</span> <span word="not">not</span> <span word="yet">yet</span> <span word="been">been</span> <span word="reviewed">reviewed</span> <span word="by">by</span> <span word="an">an</span> <span word="expert">expert</span>.</p><p>他将其发表在<span word="NASA">NASA</span>技术报告服务器上，标题是“螺旋引擎”。理论上来说它的工作原理是利用相对论性速度（即与真空中光速接近的速度）下质量变化的方式。至今还没有专家对此做出评论。</p>
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