小行星11月8日与地球“擦身而过”
<p>一颗航空母舰大小的小行星将在11月8日与地球擦身而过 ，届时它离地球的距离将比月亮还要近。这颗小行星被命名为“2005 <span word="YU">YU</span>55”，体积比一艘航母略大，由太阳方向飞近地球。这颗小行星是近35年来类似体积小行星与地球距离最近的一颗。据悉，当这颗小行星与地球擦肩而过时，人的肉眼是无法看清的，但是天文爱好者可以借助6倍直径望远镜观看。</p><p>美国国家航空航天局预计，这颗小行星将在美国东部时间8日晚18时28分(北京时间9日早晨7时28分)到达距地球最近点。届时小行星和地球相距不会超过33万公里，小行星飞行中与月亮最近距离不会超过24万公里。相比宇宙宽度，地球与月亮间平均38万公里的间隔如同一条缝隙。这颗小行星恰好要从地月“缝隙”间穿过 。美国国家航空航天局近地天体计划主管表示，这颗小行星绝对不会撞到地球和月亮。天文学家2005年发现这颗小行星，而后一直借助地面天线设备跟踪监测，对其轨道非常了解。</p><p><span word="An">An</span> <span word="asteroid">asteroid</span> <span word="bigger">bigger</span> <span word="than">than</span> <span word="an">an</span> <span word="aircraft">aircraft</span> <span word="carrier">carrier</span> <span word="will">will</span> <span word="dart">dart</span> <span word="between">between</span> <span word="the">the</span> <span word="Earth">Earth</span> <span word="and">and</span> <span word="moon">moon</span> <span word="on">on</span> <span word="Tuesday">Tuesday</span> - <span word="the">the</span> <span word="closest">closest</span> <span word="encounter">encounter</span> <span word="by">by</span> <span word="such">such</span> <span word="a">a</span> <span word="huge">huge</span> <span word="rock">rock</span> <span word="in">in</span> 35 <span word="years">years</span>.</p><p><span word="But">But</span> <span word="scientists">scientists</span> <span word="say">say</span> <span word="not">not</span> <span word="to">to</span> <span word="worry">worry</span>. <span word="It">It</span> <span word="won">won</span>'<span word="t">t</span> <span word="hit">hit</span>.</p><p>"<span word="We">We</span>'<span word="re">re</span> <span word="extremely">extremely</span> <span word="confident">confident</span>, 100 <span word="percent">percent</span> <span word="confident">confident</span>, <span word="that">that</span> <span word="this">this</span> <span word="is">is</span> <span word="not">not</span> <span word="a">a</span> <span word="threat">threat</span>," <span word="said">said</span> <span word="Don">Don</span> <span word="Yeomans">Yeomans</span>, <span word="manager">manager</span> <span word="of">of</span> <span word="NASA">NASA</span>'<span word="s">s</span> <span word="Near">Near</span> <span word="Earth">Earth</span> <span word="Object">Object</span> <span word="Program">Program</span>. "<span word="But">But</span> <span word="it">it</span> <span word="is">is</span> <span word="an">an</span> <span word="opportunity">opportunity</span>."</p>
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