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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">美国宇航局利用哈勃望远镜绘制仙女座星系周围巨大的光环 </h1> <p class="xg1"> 时间：2020-8-31 09:59<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(527)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=8666&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: cnBeta.COM</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>美国宇航局利用哈勃太空望远镜绘制了一个复杂的分层结构，有两个嵌套的气体外壳，围绕着仙女座螺旋星系。</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> 美国宇航局利用哈勃太空望远镜绘制了一个复杂的分层结构，有两个嵌套的气体外壳，围绕着仙女座螺旋星系。仙女座是距离银河系最近的主要星系。虽然在北半球秋季的夜空中可以看到仙女座，但我们看不到的是围绕着这个星系的一个巨大的热稀气体光环。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202008/31/095928q0widhw650i4h4gt.jpg" target="_blank"><img src="data/attachment/portal/202008/31/095928q0widhw650i4h4gt.jpg"></a></p></div><div><br></div><div> 如果我们能看到那个气体光环，它将从仙女座星系延伸出来，宽度相当于三条大鱼。美国宇航局利用哈勃太空望远镜对气体光环进行了全面研究。科学家发现，这个几乎看不见的弥漫等离子体从仙女座延伸到130万光年的地方，也就是距离银河系一半的地方。</div><div><br></div><div> 研究人员在研究过程中发现，该光环具有分层结构，有两个主要的嵌套和不同的气体外壳。这是迄今为止对星系周围光环进行的最全面的研究。来自耶鲁大学的研究人员萨曼莎-巴里克表示，了解围绕星系的巨大气体光环"无比重要"。她说，这个气体库包含了银河系内未来恒星形成的燃料，以及超新星等事件的流出物。</div><div><br></div><div> 美国宇航局第一次能够非常详细地研究这个巨大的气体库，了解有关于银河系过去和未来演化的线索。这个气体内壳延伸了大约50万光年，据描述，它比外壳更加复杂和动态。外层外壳更光滑、更热。这种差异可能是由于星系盘中超新星活动的影响更直接地影响了内层光环。</div><div><br></div><div> 仙女座星系又称M31，是一个拥有多达1万亿颗恒星的螺旋星系，大小与银河系相当。美国国家航空航天局（NASA）为研究气体云而实施的项目叫做"AMIGA项目"，是仙女座离子气体吸收图的缩写。这项研究检查了来自43颗非常遥远类星体的光线。</div><div><br></div><div> 类星体是由黑洞驱动的活跃星系的明亮核心。该团队能够观察到来自类星体的光是如何被气体吸收的，以及这种吸收在不同区域是如何变化的。哈勃宇宙起源光谱仪被用来研究来自这些类星体的紫外光。</div><div><br></div><div><br></div><div><p style="text-align: center; overflow-wrap: normal; margin: 0px; padding: 0px; color: rgb(143, 143, 143); font-family: Tahoma, "Microsoft Yahei", Simsun;"><a href="http://www.oecr.com/data/attachment/portal/202008/26/102900rcqumq1efrr1eeyu.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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</div></div></div></div></div><!--[/diy]--> </div> <!--[diy=diycontentrelate]--><div id="diycontentrelate" class="area"></div><!--[/diy]--> <div id="comment" class="bm"> <div class="bm_h cl"> <a href="javascript:;" class="y xi2" onclick="location.href=location.href.replace(/(\#.*)/, '')+'#cform';$('message').focus();return false;">发表评论</a> <h3>最新评论</h3> </div> <div id="comment_ul" class="bm_c"> <p class="ptm pbm"><a href="http://www.oecr.com/portal.php?mod=comment&id=8666&idtype=aid" class="xi2">查看全部评论(<em id="_commentnum">5</em>)</a></p><form id="cform" name="cform" action="portal.php?mod=portalcp&ac=comment" method="post" autocomplete="off"> <div class="tedt"> <div class="area"> <textarea name="message" rows="3" class="pt" id="message" onkeydown="ctrlEnter(event, 'commentsubmit_btn');"></textarea> </div> </div> <div class="mtm"><span id="secqaa_qSqvb8Dl"></span> <script type="text/javascript" reload="1">updatesecqaa('qSqvb8Dl', '<sec> <span id="sec<hash>" 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value="true" class="pn"><strong>评论</strong></button></p> </form> <a name="comment_anchor_27661"></a> <dl id="comment_27661_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27661, '8666');">引用</a> </span> <a href="http://club.oecr.com/space-uid-33263.html" class="xi2 xw1" c="1">zh0427</a> <span class="xg1 xw0">2020-8-31 17:44</span> </dt> <dd>广告位，，坐下看看</dd> </dl><a name="comment_anchor_27659"></a> <dl id="comment_27659_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27659, '8666');">引用</a> </span> <a href="http://club.oecr.com/space-uid-66259.html" class="xi2 xw1" c="1">gltree</a> <span class="xg1 xw0">2020-8-31 16:44</span> </dt> <dd>嘘，低调。</dd> </dl><a name="comment_anchor_27653"></a> <dl id="comment_27653_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27653, '8666');">引用</a> </span> <a href="http://club.oecr.com/space-uid-33563.html" class="xi2 xw1" c="1">hjl710203</a> <span class="xg1 xw0">2020-8-31 13:44</span> </dt> <dd>太好了，这个。</dd> </dl><a name="comment_anchor_27652"></a> <dl id="comment_27652_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27652, '8666');">引用</a> </span> <a href="http://club.oecr.com/space-uid-48528.html" class="xi2 xw1" c="1">essen</a> <span class="xg1 xw0">2020-8-31 13:14</span> </dt> <dd>科技真神奇。</dd> </dl><a name="comment_anchor_27647"></a> <dl id="comment_27647_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27647, '8666');">引用</a> </span> <a href="http://club.oecr.com/space-uid-36491.html" class="xi2 xw1" c="1">bochunbo</a> <span class="xg1 xw0">2020-8-31 11:14</span> </dt> <dd>谢谢分享。</dd> </dl></div> </div> 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