超大黑洞被发现，质量超过400亿个太阳
<p><span word="Black">Black</span> <span word="holes">holes</span> <span word="can">can</span> <span word="get">get</span> <span word="pretty">pretty</span> <span word="big">big</span>, <span word="but">but</span> <span word="there">there</span>'<span word="s">s</span> <span word="a">a</span> <span word="special">special</span> <span word="class">class</span> <span word="that">that</span> <span word="is">is</span> <span word="the">the</span> <span word="biggest">biggest</span> <span word="of">of</span> <span word="the">the</span> <span word="big">big</span>, <span word="absolute">absolute</span> <span word="yawning">yawning</span> <span word="monster">monster</span> <span word="black">black</span> <span word="holes">holes</span>.</p><p>黑洞可能会很大，但有一种特殊的黑洞，它是那些就像张着大嘴的怪物一般的黑洞中最大的。</p><p><span word="And">And</span> <span word="astronomers">astronomers</span> <span word="seem">seem</span> <span word="to">to</span> <span word="have">have</span> <span word="found">found</span> <span word="an">an</span> <span word="absolute">absolute</span> <span word="specimen">specimen</span>, <span word="clocking">clocking</span> <span word="in">in</span> <span word="at">at</span> 40 <span word="billion">billion</span> <span word="times">times</span> <span word="the">the</span> <span word="mass">mass</span> <span word="of">of</span> <span word="the">the</span> <span word="Sun">Sun</span>.</p><p>天文学家似乎发现了这样的一个黑洞，它达到了太阳质量的400亿倍大。</p><p><span word="It">It</span>'<span word="s">s</span> <span word="at">at</span> <span word="the">the</span> <span word="centre">centre</span> <span word="of">of</span> <span word="a">a</span> <span word="galaxy">galaxy</span> <span word="called">called</span> <span word="Holmberg">Holmberg</span> 15<span word="A">A</span>, <span word="a">a</span> <span word="supergiant">supergiant</span> <span word="elliptical">elliptical</span> <span word="galaxy">galaxy</span> <span word="around">around</span> 700 <span word="million">million</span> <span word="light">light</span>-<span word="years">years</span> <span word="away">away</span>, <span word="which">which</span> <span word="in">in</span> <span word="turn">turn</span> <span word="sits">sits</span> <span word="at">at</span> <span word="the">the</span> <span word="centre">centre</span> <span word="of">of</span> <span word="the">the</span> <span word="Abell">Abell</span> 85 <span word="galaxy">galaxy</span> <span word="cluster">cluster</span>.</p><p>它位于一个被称为霍姆伯格15<span word="A">A</span>的星系中心，这是一个（距地球）约7亿光年远的超大椭圆星系，它位于阿贝尔85星系群中心。</p><p><span word="The">The</span> <span word="object">object</span> <span word="is">is</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="biggest">biggest</span> <span word="black">black</span> <span word="holes">holes</span> <span word="ever">ever</span> <span word="found">found</span>, <span word="and">and</span> <span word="the">the</span> <span word="biggest">biggest</span> <span word="found">found</span> <span word="by">by</span> <span word="tracking">tracking</span> <span word="the">the</span> <span word="movement">movement</span> <span word="of">of</span> <span word="the">the</span> <span word="stars">stars</span> <span word="around">around</span> <span word="it">it</span>.</p><p>该目标是迄今为止发现的最大的黑洞之一，也是通过追踪它周围的恒星运动所发现的最大的黑洞。</p><p><span word="Previous">Previous</span> <span word="calculations">calculations</span> <span word="based">based</span> <span word="on">on</span> <span word="the">the</span> <span word="dynamics">dynamics</span> <span word="of">of</span> <span word="the">the</span> <span word="galaxy">galaxy</span> <span word="and">and</span> <span word="the">the</span> <span word="cluster">cluster</span> <span word="had">had</span> <span word="resulted">resulted</span> <span word="in">in</span> <span word="Holm">Holm</span> 15<span word="A">A</span>* <span word="mass">mass</span> <span word="estimates">estimates</span> <span word="of">of</span> <span word="up">up</span> <span word="to">to</span> 310 <span word="billion">billion</span> <span word="times">times</span> <span word="the">the</span> <span word="mass">mass</span> <span word="of">of</span> <span word="the">the</span> <span word="Sun">Sun</span>.</p><p>先前根据星系和星团动态得出的计算结果显示，霍姆15<span word="A">A</span>*星系可能是太阳的3100亿倍大。</p><p><span word="However">However</span>, <span word="these">these</span> <span word="were">were</span> <span word="all">all</span> <span word="indirect">indirect</span> <span word="measurements">measurements</span> <span word="of">of</span> <span word="the">the</span> <span word="black">black</span> <span word="hole">hole</span>. <span word="This">This</span> <span word="new">new</span> <span word="research">research</span> <span word="marks">marks</span> <span word="the">the</span> <span word="first">first</span> <span word="direct">direct</span> <span word="measurement">measurement</span>; <span word="the">the</span> <span word="paper">paper</span> <span word="has">has</span> <span word="been">been</span> <span word="submitted">submitted</span> <span word="to">to</span> <span word="The">The</span> <span word="Astrophysical">Astrophysical</span> <span word="Journal">Journal</span>, <span word="and">and</span> <span word="awaits">awaits</span> <span word="peer">peer</span> <span word="review">review</span>.</p>
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