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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=58" 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=153582&size=small" /></div> <h1 class="ph">激光照射火星岩石发现古河床 数十亿年前存在“水” </h1> <p class="xg1"> 时间：2013-9-29 15:14<a class="zz" href="home.php?mod=space&uid=153582">作者：laser121</a> 阅读<em id="_viewnum">(2153)</em> 评论: 0光粒网来自: 光粒网</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" 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>科学家们一致认为火星是一个可居住的星球，因而对火星生命的探索一直从未停止，自从美国好奇号火星车登陆火星之后，不仅让我们更好的了解火星，同时也揭秘着火星或许存在生命的痕迹。近日，好奇号火星车利用激光照射 ...</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"><font face="宋体" size="3"> </font><p align="center" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"></span> </p><font face="宋体" size="3"> </font><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><font size="3"> </font>科学家们一致认为火星是一个可居住的星球，因而对火星生命的探索一直从未停止，自从美国好奇号火星车登陆火星之后，不仅让我们更好的了解火星，同时也揭秘着火星或许存在生命的痕迹。近日，好奇号火星车利用<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>照射火星岩石的内部组分，发现了类似地球河床的存在痕迹，使得科学家认为岩层中或许有微生物存在。</span><span lang="EN-US"><o:p></o:p></span><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"> </font></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Calibri"> </font></span></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">据国外媒体报道，美国宇航局的好奇号火星车自</span><span lang="EN-US"><font face="Calibri">2012</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">年</span><span lang="EN-US"><font face="Calibri">8</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">月降落盖尔撞击坑以来，已经取得了多个重大发现，暗示古老火星上曾经存在湿润环境，图中<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>的是好奇号正在对一处名为</span><span lang="EN-US"><font face="Calibri">Hottah</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">区域进行调查，这里可能属于古老火星上的河床。在欧洲行星科学大会上，科学家聚集在一起列举了火星在遥远过去相当潮湿的证据。</span></p><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;"><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"></p><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"> </p><p align="center" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"> <img src="http://s3.sinaimg.cn/mw690/d2091071gx6D1K3wejw22&690"><div align="left"> </div></p></span><p align="center" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"> </p><p align="center" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"></font></o:p></span> </p><font face="宋体" size="3"> </font><p align="center" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: center; text-indent: 21pt;"><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">好奇号的相机系统拍摄到的火星“河床”</span><span lang="EN-US"><o:p></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"> </font></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Calibri"> </font></span></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">火星车对火星岩石的研究显示，古老的火星可以支持微生物的存在，在火星形成后不久，就出现了一个初级可居住环境，火星的演化史上至少出现了两个主要的潮湿环境阶段。好奇号在钻探火星岩石时，研究人员发现了粘土矿物，这意味着火星环境出现了较大程度的变化，流动的水塑造了我们现在看到的河床地貌。不仅好奇号发现了火星湿润环境证据，</span><span lang="EN-US"><font face="Calibri">2004</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">年登陆火星的勇气号和机遇号也发现了很多古老火星存在水的证据，但最早的火星“水”很可能是酸性的。行星科学研究所科学家认为这一信息与地球上的液态水环境非常类似，地球也有类似的现象出现，并推测火星的湖泊中是一个理想的微生物生存和繁殖场所。</span><span lang="EN-US"><o:p></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"> </font></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Calibri"> </font></span></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">好奇号携带的</span><span lang="EN-US"><font face="Calibri">ChemCam</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">仪对火星岩石进行调查，并通过激光照射探测其内部组分，并在耶洛奈夫湾附近发现了类似地球河床的痕迹，结果显示这里湍急的水流逐渐塑造出早期火星的河床，伦敦帝国学院科学家认为这些现象清楚地表明远古火星上存在河床，并保存了大约数十亿年之久。</span><span lang="EN-US"><o:p></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"> </font></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Calibri"> </font></span></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">好奇号现在开始对盖尔撞击坑中的夏普山进行调查，其高度为</span><span lang="EN-US"><font face="Calibri">5000</font></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">千米左右，科学家认为这里的岩层中可能存在微生物痕迹。不久前，科学家宣布好奇号降落区域周围的土壤下方并没有微生物存在，因为我们没有探测甲烷等与生物代谢有关的物质。</span><span lang="EN-US"><o:p></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><o:p><font face="Calibri"> </font></o:p></span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; text-align: left; text-indent: 21pt;"><span lang="EN-US"><span style="mso-spacerun: yes;"><font face="Calibri"> </font></span></span><span style="font-family: 宋体; mso-ascii-font-family: Calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: Calibri; mso-hansi-theme-font: minor-latin;">通过激光照射获得了火星存在古河床的发现，是对火星研究的一项重大突破，不仅再次表明火星的存在历史，同时也为科学家研究火星或许存在微生物的可能性打开了一扇大门，具有着重要的进步意义。</span></p><font face="宋体" size="3"> </font><p align="left" class="MsoNormal" style="margin: 0cm 0cm 0pt; 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