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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">天文学家发现以 8% 光速运行的恒星 </h1> <p class="xg1"> 时间：2020-8-17 15:14<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(672)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=8631&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: solidot</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>在银河系中心，有数百颗恒星紧密围绕超大质量黑洞“人马座 A* ”运动</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 在银河系中心，有数百颗恒星紧密围绕超大质量黑洞“人马座A*”运动。它们中的大部分其运行轨道遵循牛顿引力和开普勒定律。但还有少部分太靠近黑洞其轨道只能用爱因斯坦广义相对论精确描述。最靠近黑洞的恒星被命名为S62，在最近点它的速度达到了光速的8%以上。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202008/17/151507leekesnui5bwqiel.jpg" target="_blank"><img src="data/attachment/portal/202008/17/151507leekesnui5bwqiel.jpg"></a></p></div><div><br></div><div> 在S62之前，天文学家一直认为S2是最接近人马座A*的恒星，它是一颗蓝巨星，每16年围绕黑洞运行一周。S62最近被发现比S2更靠近黑洞，它的质量两倍于太阳，每10年围绕黑洞运行一周。</div><div><br></div><div> 在最近点，S62的时间膨胀效应最显著，它的一小时相当于100地球分钟。它的轨道不是椭圆形，而是螺旋形，每周期轨道进动大约10度。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202008/17/151554jwaicifcxexle9fc.jpg" target="_blank"><img src="data/attachment/portal/202008/17/151554jwaicifcxexle9fc.jpg"></a></p><p style="text-align: center;"><br></p><p style="text-align: center;"><a href="data/attachment/portal/202008/17/151603t9fdl934jr04fs69.jpg" target="_blank"><img src="data/attachment/portal/202008/17/151603t9fdl934jr04fs69.jpg"></a></p></div><div><br></div><div> 此类的相对论进动最早是在水星轨道观测到的，效应并不大。</div><div><br></div><div><p microsoft="" yahei",="" simsun;="" background-color:="" rgb(255,="" 255,="" 255);="" text-align:="" center;"="" center;="" 255);"="" style="text-align: center; overflow-wrap: normal; margin: 0px; padding: 0px; color: rgb(143, 143, 143);"><a href="http://www.oecr.com/data/attachment/portal/202007/28/162120mrh328hrpmg4b3by.jpg" target="_blank" style="overflow-wrap: normal; color: rgb(51, 51, 51); text-decoration-line: none; transition: all 0.2s linear 0s; font-family: 微软雅黑;"><img 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