Nasa's Sun skimming mission 美国国家航空航天局启动太阳探测计划
<p><span word="Nasa">Nasa</span>'<span word="s">s</span> <span word="Sun">Sun</span> <span word="skimming">skimming</span> <span word="mission">mission</span> 美国国家航空航天局启动太阳探测计划</p><p> 美国国家航空航天局（<span word="Nasa">Nasa</span>）计划于2018年向太阳发射一个太空探测器，这艘探测器飞船将穿过1400摄氏度的高温地带，最终冲入距太阳表面400万英里（约640万公里）的区域。这个探测器将成为有史以来离太阳表面最近的人造物体。该太阳探测计划以天文物理学家尤金·派克（<span word="Eugene">Eugene</span> <span word="Parker">Parker</span>）的名字被重新命名，这位科学家曾引领与太阳“大气层”带电粒子流现象“太阳风”有关的研究。请听报道。</p><p><span word="To">To</span> <span word="understand">understand</span> <span word="the">the</span> <span word="daring">daring</span> <span word="nature">nature</span> <span word="of">of</span> <span word="this">this</span> <span word="mission">mission</span>, <span word="bear">bear</span> <span word="in">in</span> <span word="mind">mind</span> <span word="a">a</span> <span word="few">few</span> <span word="key">key</span> <span word="numbers">numbers</span>: <span word="Earth">Earth</span> <span word="orbits">orbits</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="at">at</span> <span word="a">a</span> <span word="distance">distance</span> <span word="of">of</span> 91 <span word="million">million</span> <span word="miles">miles</span>; <span word="Mercury">Mercury</span> <span word="is">is</span> <span word="much">much</span> <span word="closer">closer</span> <span word="at">at</span> <span word="about">about</span> 21 <span word="million">million</span>. <span word="But">But</span> <span word="the">the</span> <span word="Nasa">Nasa</span> <span word="Solar">Solar</span> <span word="Probe">Probe</span> <span word="will">will</span> <span word="get">get</span> <span word="to">to</span> <span word="within">within</span> <span word="four">four</span> <span word="million">million</span> <span word="miles">miles</span>. </p><p><span word="This">This</span> <span word="is">is</span> <span word="uncharted">uncharted</span> <span word="and">and</span> <span word="extremely">extremely</span> <span word="hostile">hostile</span> <span word="territory">territory</span>. <span word="The">The</span> <span word="spacecraft">spacecraft</span> <span word="will">will</span> <span word="have">have</span> <span word="to">to</span> <span word="endure">endure</span> <span word="a">a</span> <span word="temperature">temperature</span> <span word="of">of</span> <span word="nearly">nearly</span> 1400<span word="C">C</span> - <span word="the">the</span> <span word="kind">kind</span> <span word="of">of</span> <span word="heat">heat</span> <span word="generated">generated</span> <span word="inside">inside</span> <span word="a">a</span> <span word="blast">blast</span> <span word="furnace">furnace</span> <span word="in">in</span> <span word="a">a</span> <span word="steelworks">steelworks</span>. <span word="So">So</span> <span word="the">the</span> <span word="craft">craft</span> <span word="has">has</span> <span word="special">special</span> <span word="protection">protection</span> – <span word="a">a</span> <span word="shield">shield</span> <span word="of">of</span> <span word="carbon">carbon</span>-<span word="composite">composite</span> <span word="about">about</span> 4.5 <span word="inches">inches</span> <span word="thick">thick</span>. <span word="But">But</span> <span word="the">the</span> <span word="slightest">slightest</span> <span word="error">error</span> <span word="in">in</span> <span word="its">its</span> <span word="flight">flight</span> <span word="and">and</span> <span word="the">the</span> <span word="instruments">instruments</span> <span word="sheltering">sheltering</span> <span word="behind">behind</span> <span word="the">the</span> <span word="shield">shield</span> <span word="will">will</span> <span word="be">be</span> <span word="fried">fried</span>. </p><p><span word="The">The</span> <span word="motivation">motivation</span> <span word="for">for</span> <span word="flying">flying</span> <span word="so">so</span> <span word="close">close</span> <span word="to">to</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="is">is</span> <span word="to">to</span> <span word="explain">explain</span> <span word="some">some</span> <span word="of">of</span> <span word="the">the</span> <span word="mysteries">mysteries</span> <span word="about">about</span> <span word="it">it</span>. <span word="Why">Why</span>, <span word="for">for</span> <span word="example">example</span>, <span word="the">the</span> <span word="greatest">greatest</span> <span word="heat">heat</span> <span word="is">is</span> <span word="not">not</span> <span word="at">at</span> <span word="the">the</span> <span word="surface">surface</span>, <span word="but">but</span> <span word="in">in</span> <span word="the">the</span> <span word="corona">corona</span>, <span word="a">a</span> <span word="region">region</span> <span word="surrounding">surrounding</span> <span word="the">the</span> <span word="Sun">Sun</span>? <span word="It">It</span>’<span word="s">s</span> <span word="here">here</span> <span word="that">that</span> <span word="vast">vast</span> <span word="flares">flares</span> <span word="are">are</span> <span word="generated">generated</span> <span word="that">that</span> <span word="can">can</span> <span word="send">send</span> <span word="streams">streams</span> <span word="of">of</span> <span word="particles">particles</span> <span word="our">our</span> <span word="way">way</span>, <span word="which">which</span> <span word="can">can</span> <span word="disrupt">disrupt</span> <span word="anything">anything</span> <span word="electronic">electronic</span> <span word="including">including</span> <span word="satellites">satellites</span> <span word="or">or</span> <span word="power">power</span> <span word="grids">grids</span>. <span word="Understanding">Understanding</span> <span word="this">this</span> <span word="so">so</span>-<span word="called">called</span> <span word="space">space</span> <span word="weather">weather</span> <span word="is">is</span> <span word="seen">seen</span> <span word="as">as</span> <span word="vitally">vitally</span> <span word="important">important</span> <span word="to">to</span> <span word="our">our</span> <span word="modern">modern</span> <span word="economies">economies</span>, <span word="and">and</span> <span word="getting">getting</span> <span word="very">very</span> <span word="close">close</span> <span word="is">is</span> <span word="the">the</span> <span word="best">best</span> <span word="way">way</span> <span word="to">to</span> <span word="do">do</span> <span word="that">that</span>. </p>
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