美国计划2018年发射“太阳探测器”
<p>美国宇航局近日宣布，计划于2018年发射“太阳探测器”，探测器将在距离太阳表面近700万公里的外大气层轨道，观测日冕的活动。这将是<span word="NASA">NASA</span>第一个飞入日冕的探测器，也是人类首次近距离接触太阳。</p><p><span word="A">A</span> <span word="US">US</span> <span word="spacecraft">spacecraft</span> <span word="set">set</span> <span word="to">to</span> <span word="launch">launch</span> <span word="next">next</span> <span word="year">year</span> <span word="will">will</span> <span word="make">make</span> <span word="a">a</span> <span word="series">series</span> <span word="of">of</span> <span word="uNPRecedented">uNPRecedented</span> <span word="dives">dives</span> <span word="into">into</span> <span word="the">the</span> <span word="sun">sun</span>’<span word="s">s</span> <span word="scorching">scorching</span> <span word="atmosphere">atmosphere</span> <span word="to">to</span> <span word="see">see</span> <span word="how">how</span> <span word="the">the</span> <span word="star">star</span> <span word="works">works</span> <span word="and">and</span> <span word="what">what</span> <span word="can">can</span> <span word="be">be</span> <span word="done">done</span> <span word="to">to</span> <span word="better">better</span> <span word="predict">predict</span> <span word="space">space</span> <span word="weather">weather</span> <span word="events">events</span> <span word="on">on</span> <span word="Earth">Earth</span>, <span word="scientists">scientists</span> <span word="said">said</span> <span word="on">on</span> <span word="Wednesday">Wednesday</span>.</p><p>科学家31日表示，美国计划在明年发射“太阳探测器”，对太阳灼热的大气层进行一系列史无前例的探索，以观测太阳的工作原理，以及如何才能更好地预测地球上发生的空间天气事件。</p><p><span word="The">The</span> <span word="Parker">Parker</span> <span word="Solar">Solar</span> <span word="Probe">Probe</span> <span word="will">will</span> <span word="have">have</span> <span word="to">to</span> <span word="survive">survive</span> <span word="temperatures">temperatures</span> <span word="as">as</span> <span word="high">high</span> <span word="as">as</span> 2,500 <span word="Fahrenheit">Fahrenheit</span> (1,371 <span word="Celsius">Celsius</span>), <span word="impacts">impacts</span> <span word="by">by</span> <span word="supersonic">supersonic</span> <span word="particles">particles</span> <span word="and">and</span> <span word="powerful">powerful</span> <span word="radiation">radiation</span> <span word="as">as</span> <span word="it">it</span> <span word="circles">circles</span> <span word="as">as</span> <span word="close">close</span> <span word="as">as</span> 4 <span word="million">million</span> <span word="miles">miles</span> (7 <span word="million">million</span> <span word="km">km</span>) <span word="to">to</span> <span word="the">the</span> <span word="sun">sun</span>.</p><p>帕克太阳探测器将能够承受2500华氏度（约合1371摄氏度）的高温，以及超音速粒子和强大辐射的影响。它将在距离太阳近达400万英里（约合700万公里）的轨道上运行。</p>
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