“双星合璧”制造人工日食—新闻

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font: 12px 宋体; float: right"> 选择字号：<span onclick="showsize(12)" style="background-color: #587c19; color: #fff; font-size: 12px; cursor: pointer">小</span> <span onclick="showsize(14)" style="background-color: #587c19; color: #fff; font-size: 12px; cursor: pointer">中</span> <span onclick="showsize(16)" style="background-color: #587c19; color: #fff; font-size: 12px; cursor: pointer"> 大</span> </div> </td> </tr> <tr> <td align="center"> <div id="content1" style=" padding:15px; text-align: left; line-height: 24px; word-wrap: break-word;word-break:break-all" class="f14"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="20"> </td> </tr> <tr> <td align="center" valign="middle" class="style1" style="font-size: 13px; color: #333333; font-family: 宋体; line-height: 20px"> <b></b></td> </tr> <tr> <td align="center" class="style1" style="font-size: 22px; color: #587c19; font-family: 黑体; line-height: 30px"> “双星合璧”制造人工日食</td> </tr> <tr> <td align="center" valign="middle" class="style1" style="font-size: 13px; color: #333333; font-family: 宋体; line-height: 20px"> <b></b></td> </tr> </table> <p > </p><p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">欧洲空间局（ESA）近期的目标是利用即将执行的“普罗巴3 号”（Proba-3）掩星-日冕观测任务，在太空中制造一次人工日食。这将有助于研究太阳，并展示全球首次高精度编队飞行技术——精确到仅一毫米。</p> <div style="text-align: center;" class="ueditorOption ueditorOptionModel" contenteditable="true" id="0"> <img src="https://rmtzx.sciencenet.cn//kxwsprint/6739c28fe4b03b5da6d1abe4.png" data-wenge-id="136755" wosname="6739c28fe4b03b5da6d1abe4.png" size="192949" opaid="wenge-g54b05zka9d0/" data-mce-src="https://rmtzx.sciencenet.cn//kxwsprint/6739c28fe4b03b5da6d1abe4.png" id="img-null"> <p><span style="font-family:宋体">“普罗巴</span>3 <span style="font-family:宋体">号”任务的两艘航天器将制造一次人工日食。图片来源：</span>ESA</p> </div> <p class="timeLine_wg" style="height:20px;"><span style="display:none"><span contenteditable="false" style="height: 0px; padding: 0px; margin: 0px; display: block; z-index: 9999; color: rgb(255, 255, 255); font-size: 0px; line-height: 0px; position: absolute; border-top: 1px dashed rgb(181, 189, 202); user-select: none; left: 0px; right: 0px; top: 8px;"><span class="timeIdentification" style="width:0px;height:0px;padding:0px;margin:0px;display:block;z-index:9999;color:#fff;position:absolute;font-size: 0px;line-height:0px;border-color:transparent;display:block;border-style:solid;right:0px;border-right-color:#B5BDCA;border-width:8px 8px 8px 0;top:-8px"> </span><span style="width:0px;height:0px;padding:0px;margin:0px;display:block;z-index:9999;color:#fff;position:absolute;font-size: 0px;line-height:0px;border-color:transparent;display:block;border-style:solid;left:0px;border-left-color:#B5BDCA;border-width:8px 0 8px 8px;top:-8px"> </span><span class="hide_time_wg" title="在这插入段落" contenteditable="false" style="width:0px;height:0px;padding:0px;margin:0px;display:block;z-index:9999;color:#fff;position:absolute;font-size: 22px;line-height:17px;height:17px;text-align: center;width:17px;right:17px;background:#B5BDCA;cursor:pointer;top:-8px; border-radius: 2px;" onclick="timeLine(this)">?</span></span></span></p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">该任务计划于12月4日由印度极轨卫星运载火箭PSLV-XL发射，由两艘航天器组成。发射后，它们将被置于围绕地球的高椭圆轨道。该轨道距离地球最近为600公里，最远则为6万公里。</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">其中一艘航天器名为“Occulter（掩体）”，配备了一个由碳纤维和塑料制成的1.4米宽的圆盘。另一艘航天器名为“Coronagraph（日冕仪）”，在第一艘航天器后方约150米处飞行，并将一台摄像机对准它。</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">从这个有利位置来看，Occulter的圆盘将遮挡太阳表面，就像月球在日全食期间遮住太阳一样。这将使成像的Coronagraph能够以前所未有的细节观察日冕，即太阳大气的最外层。</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">“普罗巴3 号”任务主管Damien Galano说：“这将是我们在可见光下观测到的最接近太阳的日冕，可以传递给我们一些关于日冕温度、太阳风的产生以及日冕如何膨胀到太空的具体信息。”</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">“普罗巴3 号”任务将以令人难以置信的高精度飞行实现这一壮举。两艘航天器都装载了传感器，以便研究人员跟踪它们在太空中的位置。Occulter将使用12个氮气推进器自动将其与Coronagraph的位置保持在一毫米的精度。推进器只能实现10毫牛顿的推力，是人类呼吸的力量的1/50。</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;">每次人工月食将出现在航天器离地球最远时，持续6小时。在为期两年的“普罗巴3 号”任务中，计划制造1000多次人工日食。Galano说，这是自1975年阿波罗-联盟测试计划以来首次在太空进行人工日食实验。</p> <p style=";; margin: 0px 0px 26px; text-align: justify; word-break: break-all;" class="lastPadding">据介绍，从“普罗巴3号”任务中获得的经验可以应用于航天器加油、太空大型望远镜开发等。</p><div> </div><div style="text-indent:0em;font-weight:bold;font-size:13px;border:solid 1px #333 ;padding:10px;" class="bq">版权声明：凡本网注明“来源：中国科学报、科学网、科学新闻杂志”的所有作品，网站转载，请在正文上方注明来源和作者，且不得对内容作实质性改动；微信公众号、头条号等新媒体平台，转载请联系授权。邮箱：shouquan@stimes.cn。</div> <div style="border-bottom: solid 1px #bfc89d; vertical-align: bottom; width: 100%; height: 20px"> </div> <div style="width: 100%; height: 20px; text-align: center; margin:10px">  <script src="/html/js/share.js" type="text/javascript"></script>  </div> </div> </td> </tr> </table> </td> </tr> </table> <div style="line-height: 10px; height: 10px; clear: both;">  </div> <div style=" vertical-align: bottom; width: 100%; text-align:right"> <div style="float:left"> </div> <form action="/html/mail.aspx" method="post" id="myform" style="float:right"> <span onclick="javascript:window.print()" style="cursor: pointer; 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