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		<title>长蛇座星系团 (The Hydra Cluster of Galaxies)</title>
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		<pubDate>Mon, 14 May 2012 05:40:41 +0000</pubDate>
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				<category><![CDATA[探索]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[长蛇座，星系团]]></category>

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		<description><![CDATA[长蛇座星系团 影像提供与版权: Angus Lau 说明: 我们银河系内的二颗恒星，成了这幅宇宙影像的锚点。在这二颗离我们约数百光年远的恒星之后，散布著距离超过一亿光年的长蛇座星系团 ( the Hydra Cluster)的成员星系。星系团中心的那三个庞大星系─二个黄色的椭圆星系 (NGC 3311与NGC 3309)及醒目的蓝色螺旋星系 (NGC 3312)─直径都在十五万光年左右。紧邻在星系NGC 3312的左上方，可见到编录号为NGC 3314的有趣重合星系。亦名为Abell 1060的长蛇座星系团，是离银河系二亿光年范围之内的三个大星系团之一。在我们邻近的宇宙空间中，星系在重力的束缚下，聚成星系团，然后再聚成松散的超星系团，最后进一步聚成更大尺度的宇宙结构。以一亿光年的距离来估算，这幅影像的跨幅约有一百三十万光年。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/134045phw.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/134045phw.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>长蛇座星系团 </strong><br />
<strong>影像提供与版权</a>:</strong> <a href="mailto: anguskmlau at gmail dot com">Angus Lau</a></p>
<p><strong>说明: </strong>我们银河系内的二颗恒星，成了这幅宇宙影像</a>的锚点。在这二颗离我们约数百光年远的恒星之后，散布著距离超过一亿光年的长蛇座星系团 ( the Hydra Cluster)</a>的成员星系。星系团中心的那三个庞大星系─二个黄色的<a href="http://www.skylook.org/apod/ap060520.html">椭圆星系</a> (NGC 3311与NGC 3309)及醒目的蓝色螺旋星系 (NGC 3312)─直径都在十五万光年左右。紧邻在星系NGC 3312的左上方，可见到编录号为<a href="http://www.skylook.org/apod/ap110715.html">NGC 3314</a>的有趣重合星系。亦名为Abell 1060的长蛇座星系团，是离银河系二亿光年范围之内的三个大星系团之一。在我们<a href="http://www.skylook.org/apod/ap110614.html">邻近的宇宙空间</a>中，星系在重力的束缚下，聚成星系团，然后再聚成松散的<a href="http://heasarc.nasa.gov/docs/cosmic/nearest_superclusters_info.html">超星系团</a>，最后进一步聚成更大<a href="http://www.skylook.org/apod/ap120312.html">尺度的宇宙结构。以一亿光年的距离来估算，这幅影像的<a href="http://chandra.harvard.edu/photo/scale_distance.html">跨幅约有一百三十万光年。</p>
<p><a href="http://chandra.harvard.edu/photo/scale_distance.html">&nbsp;</p>
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		<title>最像地球的行星Kepler 22b(Kepler 22b: An Almost Earth Orbiting an Almost Sun)</title>
		<link>http://www.richens.net/851.html</link>
		<comments>http://www.richens.net/851.html#comments</comments>
		<pubDate>Sat, 12 May 2012 06:14:59 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[Kepler 22b]]></category>
		<category><![CDATA[地球]]></category>
		<category><![CDATA[外星人]]></category>
		<category><![CDATA[行星]]></category>

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		<description><![CDATA[最像地球的行星Kepler 22b 影像提供與版權: NASA / Ames / JPL-Caltech 說明: 這是目前找到最像地球的行星。最近所發現的 Kepler 22已成為尋找外星生命的最佳地點，這顆 恆星的表面溫度，略低於太陽，也比太陽體積小一點，而且離地球僅僅600光年遠，位於天鵝座方向附近。Kepler 22b約為兩倍地球直徑，軌道距離雖然更靠近其母星，但是依舊位於適居區(habitable zone)，距離恰巧能讓水以液態的形式在表面存在。這張照片是藝術家描繪Kepler 22b對靠近中的太空船眼中，這個系統和我們太陽系內行星區的比較。雖然Kepler 22b是否真的有生命或水的存在 ，仍是未知，但SETI計畫會開始監測Kepler 22b的一舉一動。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/14150238Q.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/14150238Q.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>最像<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%b0%e7%90%83" title="查看 地球 的全部文章" target="_blank">地球</a></span>的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%a1%8c%e6%98%9f" title="查看 行星 的全部文章" target="_blank">行星</a></span><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/kepler-22b" title="查看 Kepler 22b 的全部文章" target="_blank">Kepler 22b</a></span> </strong><br />
<strong>影像提供與版權: </strong>NASA</a> / <a href="http://www.nasa.gov/centers/ames/home/index.html">Ames</a> / <a href="http://www.jpl.nasa.gov/">JPL-Caltech</a></p>
<p><strong>說明: </strong>這是目前找到最像<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%b0%e7%90%83" title="查看 地球 的全部文章" target="_blank">地球</a></span>的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%a1%8c%e6%98%9f" title="查看 行星 的全部文章" target="_blank">行星</a></span>。<a href="http://www.nasa.gov/mission_pages/kepler/news/kepscicon-briefing.html">最近所發現的</a> <a href="http://en.wikipedia.org/wiki/Kepler_22">Kepler 22</a>已成為尋找外星生命的最佳地點，這顆 恆星的表面溫度，略低於<a href="http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap110207.html">太陽</a>，也比太陽體積小一點，而且離<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%b0%e7%90%83" title="查看 地球 的全部文章" target="_blank">地球</a></span>僅僅600<a href="http://chandra.harvard.edu/photo/cosmic_distance.html">光年</a>遠，位於<a href="http://www.ehow.com/how_4454684_find-swan-constellation.html">天鵝座</a>方向附近。<a href="http://en.wikipedia.org/wiki/Kepler-22b">Kepler 22b</a>約為兩倍地球直徑，軌道距離雖然更靠近其母星，但是依舊位於<a href="http://en.wikipedia.org/wiki/Habitable_zone">適居區(habitable zone)</a>，距離恰巧能讓水以液態的形式在表面存在。<a href="http://www.nasa.gov/mission_pages/kepler/multimedia/images/kepler-22b-diagram.html">這張照片</a>是藝術家描繪<a href="http://www.youtube.com/watch?v=en5OObU0ryU">Kepler 22b</a>對靠近中的<a href="http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap100216.html">太空船</a>眼中，這個系統和我們太陽系內<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%a1%8c%e6%98%9f" title="查看 行星 的全部文章" target="_blank">行星</a></span>區的比較。雖然<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/kepler-22b" title="查看 Kepler 22b 的全部文章" target="_blank">Kepler 22b</a></span>是否真的有生命或水的存在 ，仍是未知，但<a href="http://www.seti.org/">SETI</a>計畫會開始<a href="http://www.seti.org/node/905">監測Kepler 22b的一舉一動。</a></p>
<p><a href="http://www.seti.org/node/905">&nbsp;</p>
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		<title>巴黎的超级月亮(Supermoon Over Paris)</title>
		<link>http://www.richens.net/846.html</link>
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		<pubDate>Tue, 08 May 2012 11:14:51 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[Supermoon]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[超级月亮]]></category>

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		<description><![CDATA[巴黎的超级月亮 影像提供与版权: VegaStar Carpentier 说明: 上周六晚上，你有看见满月吗？这次的满月又称为超级月亮(supermoon)，因为月球轨道比较靠近地球的关系，这次月亮比平常所见的还大一些。这张精彩影像是上周六晚上，搭配着法国 巴黎的艾菲尔铁塔。然而，月亮前景的物体可以因为观看距离不同而调整。如果用靠近观测者的地景，相比之下，月亮看起来较小，但是如果是用遥远地景的话，月亮则会看起来更加的巨大。下一次的满月，估计会比这次的满月小1%左右。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/191452jJy.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/191452jJy.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>巴黎的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%b6%85%e7%ba%a7%e6%9c%88%e4%ba%ae" title="查看 超级月亮 的全部文章" target="_blank">超级月亮</a></span> </strong><br />
<strong>影像提供与版权: </strong>VegaStar Carpentier</a></p>
<p><strong>说明: </strong>上周六晚上，你有看见满月吗？这次的满月又称为<a href="http://en.wikipedia.org/wiki/Supermoon">超级月亮(supermoon)</a>，<a href="http://asterisk.apod.com/viewtopic.php?f=29&amp;t=28458#p174961">因为月球轨道比较靠近地球的关系</a>，这次月亮比平常所见的还大一些。<a href="http://www.flickr.com/photos/vegastarcarpentier/7146552595/in/photostream/">这张精彩影像</a>是上周六晚上，搭配着<a href="http://en.wikipedia.org/wiki/France">法国</a> <a href="http://en.wikipedia.org/wiki/Paris">巴黎</a>的<a href="http://www.youtube.com/watch?v=pPOUg26EXiU">艾菲尔铁塔</a>。然而，月亮<a href="http://cosmiclog.msnbc.msn.com/_news/2012/05/05/11557176-how-big-is-that-supermoon-anyway">前景的物体</a>可以因为<a href="http://www.youtube.com/watch?v=Uo0F1YEYU1U">观看距离不同而调整</a>。如果用靠近观测者的地景，相比之下，月亮<a href="http://www.skylook.org/apod/ap040524.html">看起来较小</a>，但是如果是用遥远地景的话，月亮则会看起来<a href="http://www.skylook.org/apod/ap120310.html">更加的巨大</a>。下一次的满月，估计会比这次的满月小<a href="http://www.flickr.com/photos/radicalretinoscopy/7147332123/">1%左右。</a></p>
<p><a href="http://www.flickr.com/photos/radicalretinoscopy/7147332123/">&nbsp;</p>
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		<title>哈伯太空望远镜的蟹状星云(M1: The Crab Nebula from Hubble)</title>
		<link>http://www.richens.net/828.html</link>
		<comments>http://www.richens.net/828.html#comments</comments>
		<pubDate>Sun, 06 May 2012 04:11:33 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[哈伯太空望远镜]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[蟹状星云]]></category>

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		<description><![CDATA[哈伯太空望远镜的蟹状星云 (M1) 影像提供: NASA, ESA, J. Hester, A. Loll (ASU); Acknowledgement: Davide De Martin (Skyfactory) 说明: 这是恒星爆炸后所留下的混乱碎片云。蟹状星云 (Crab Nebula)是西元1054年 (北宋至和元年)超新星的遗骸，它的内部到处都是神祕的丝状物。这些丝状物不仅极为复杂，扩张速度也高于自由爆炸所应有的。在上面这张哈伯太空望远镜像三色合成影像里，颜色的选择是基于科学目的。蟹状星云的大小约有10光年，此星云的正中心藏着一颗波霎；一颗质量和太阳相当的中子星，大小则和一座小城相近。蟹状星云波霎每秒大约自转30次。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/121138mMD.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/121138mMD.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%93%88%e4%bc%af%e5%a4%aa%e7%a9%ba%e6%9c%9b%e8%bf%9c%e9%95%9c" title="查看 哈伯太空望远镜 的全部文章" target="_blank">哈伯太空望远镜</a></span>的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%9f%b9%e7%8a%b6%e6%98%9f%e4%ba%91" title="查看 蟹状星云 的全部文章" target="_blank">蟹状星云</a></span> (M1) </strong><br />
<strong>影像提供: </strong>NASA</a>, <a href="http://hubble.esa.int/">ESA</a>, J. Hester, A. Loll (<a href="http://sese.asu.edu/">ASU</a>); Acknowledgement: Davide De Martin (<a href="http://www.skyfactory.org/">Skyfactory</a>)</p>
<p><strong>说明: </strong>这是恒星爆炸后所留下的混乱碎片云。<a href="http://www.seds.org/messier/m/m001.html">蟹状星云 (Crab Nebula)</a>是<a href="http://www.seds.org/messier/more/m001_sn.html">西元1054年</a> (北宋至和元年)<a href="http://imagine.gsfc.nasa.gov/docs/science/know_l1/supernovae.html">超新星</a>的遗骸，它的内部到处都是<a href="http://www.youtube.com/watch?v=5VnJ9pRR8-8">神祕</a>的丝状物。这些<a href="http://www.skylook.org/apod/ap980208.html">丝状物</a>不仅极为复杂，扩张速度也<a href="http://adsabs.harvard.edu/abs/1995ApJ...454L.129F%3Eless%20mass%20than%20expelled%3C/a%3E%20in%20the%20original%20supernova%20and%20a%3Ca%20href=">高于</a>自由爆炸所应有的。在上面这张<a href="http://www.skylook.org/apod/ap950810.html">哈伯太空望远镜像</a>三色合成<a href="http://hubblesite.org/newscenter/archive/releases/2005/37/">影像</a>里，颜色的选择是基于科学目的。<a href="http://en.wikipedia.org/wiki/Crab_Nebula">蟹状星云</a>的大小约有10<a href="http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html">光年</a>，<a href="http://www.youtube.com/watch?v=baJ43ByylbM">此星云</a>的正中心藏着一颗<a href="http://www.jb.man.ac.uk/~pulsar/Education/Sounds/sounds.html">波霎</a>；一颗质量和<a href="http://en.wikipedia.org/wiki/Sun">太阳</a>相当的<a href="http://www.astro.umd.edu/~miller/nstar.html">中子星</a>，大小则和一座<a href="http://www.cityofhoughton.com/">小城</a>相近。<a href="http://www.skylook.org/apod/ap020920.html">蟹状星云波霎每秒大约自转30次。</a></p>
<p><a href="http://www.skylook.org/apod/ap020920.html">&nbsp;</p>
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		<title>一个在土星肆虐的风暴系统(A Raging Storm System on Saturn)</title>
		<link>http://www.richens.net/824.html</link>
		<comments>http://www.richens.net/824.html#comments</comments>
		<pubDate>Sun, 06 May 2012 04:06:42 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[土星]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[风暴]]></category>

		<guid isPermaLink="false">http://www.richens.net/?p=824</guid>
		<description><![CDATA[一个在土星肆虐的风暴系统 影像提供与版权: Cassini Imaging Team, SSI, JPL, ESA, NASA 说明: 这个是太阳系最大也最老的风暴系统。这个位于土星北半球的风暴，自去年底发现的时候，就比地球还大，并且快速地蔓延到整颗行星。这个风暴不仅可能地球观测，绕行土星的卡西尼号也能一窥究竟。这张影像是二月所拍摄的红外线数据，橘色色彩是深对流云系，而浅色的位置则是更高的云系。土星环十分接近蓝色水平线，水平的暗带则是右上方太阳照耀着土星环，投射到土星上的影子。来自于闪电的无线电噪声，这个剧烈风暴可能是因为北半球慢慢地进入春季，季节更迭而带来的剧烈天气。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/120645xhv.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/120645xhv.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>一个在<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%9f%e6%98%9f" title="查看 土星 的全部文章" target="_blank">土星</a></span>肆虐的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e9%a3%8e%e6%9a%b4" title="查看 风暴 的全部文章" target="_blank">风暴</a></span>系统 </strong><br />
<strong>影像提供与版权: </strong>Cassini Imaging Team</a>, <a href="http://www.spacescience.org/">SSI</a>, <a href="http://www.jpl.nasa.gov/">JPL</a>, <a href="http://www.esa.int/">ESA</a>, <a href="http://www.nasa.gov/">NASA</a></p>
<p><strong>说明: </strong>这个是太阳系最大也最老的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e9%a3%8e%e6%9a%b4" title="查看 风暴 的全部文章" target="_blank">风暴</a></span>系统。这个位于<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%9f%e6%98%9f" title="查看 土星 的全部文章" target="_blank">土星</a></span>北半球的<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e9%a3%8e%e6%9a%b4" title="查看 风暴 的全部文章" target="_blank">风暴</a></span>，自<a href="http://www.ciclops.org/index/6967/The_Saturn_Storm_Chronicles">去年底发现的时候</a>，就比地球还大，并且<a href="http://www.youtube.com/watch?v=--YJcJrDYnM">快速地蔓延</a>到整颗行星。这个风暴不仅可能<a href="http://www.skylook.org/apod/ap110317.html">地球</a>观测，绕行<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%9f%e6%98%9f" title="查看 土星 的全部文章" target="_blank">土星</a></span>的<a href="http://saturn.jpl.nasa.gov/spacecraft/overview/">卡西尼号</a>也能<a href="http://www.skylook.org/apod/ap110119.html">一窥究竟</a>。<a href="http://photojournal.jpl.nasa.gov/catalog/PIA12829">这张影像</a>是二月所拍摄的红外线数据，橘色色彩是<a href="http://www.skylook.org/apod/ap110708.html">深对流云系</a>，而浅色的位置则是更高的云系。<a href="http://en.wikipedia.org/wiki/Rings_of_Saturn">土星环</a>十分接近蓝色水平线，水平的暗带则是右上方太阳照耀着土星环，<a href="http://www.skylook.org/apod/ap111012.html">投射到土星上的影子</a>。来自于<a href="http://www.skylook.org/apod/ap100419.html">闪电</a>的无线电噪声，这个<a href="http://www.skylook.org/apod/ap080505.html">剧烈风暴</a>可能是因为北半球<a href="http://www.youtube.com/watch?v=jW0EsR2FBD4">慢慢地进入春季，季节更迭而带来的剧烈天气。</a></p>
<p><a href="http://www.youtube.com/watch?v=jW0EsR2FBD4">&nbsp;</p>
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		<title>M27:哑铃星云 (M27: The Dumbbell Nebula)</title>
		<link>http://www.richens.net/820.html</link>
		<comments>http://www.richens.net/820.html#comments</comments>
		<pubDate>Fri, 04 May 2012 13:02:35 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[M27]]></category>
		<category><![CDATA[哑铃星云]]></category>
		<category><![CDATA[天文]]></category>

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		<description><![CDATA[M27:哑铃星云 影像提供与版权: Bill Snyder (Bill Snyder Photography) 说明: 1764年，梅西叶(Charles Messier)在无意中发现了我们太阳未来的宿命。在当时，他将一些可能混淆成彗星的迷濛状的天体编了一个目录。在梅西叶的目录中，哑铃星云的编号是27，所以现在就称它为M27。M27是行星状星云，而将来我们太阳核心的核融合反应停止后，它也会产生这种星云。 M27位在北天的狐狸座 (Vulpecula)内，是夜空中最明亮的行星状星云之一，透过双筒望远镜就能够找到他的踪影。上图中的M27由氢与氧所发出的光，大约要用上1000年才会传到我们这里。虽然M27的发现很早，但是了解它所要用到的物理和真正体会到它的重要性，都远超过18世纪的科学知识。甚至到现在，像M27这种双极瓣状的行星状星云，还是有许多无法解释的谜团。这些谜团包括低质量恒星抛出外层气壳的物理机制是什么呢？在卸去它的外层气壳后，恒星的核心就露了出来，形成一颗发出很强X射线辐射的白矮星。 &#160;<table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/210238j6E.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/210238j6E.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/m27" title="查看 M27 的全部文章" target="_blank">M27</a></span>:<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%93%91%e9%93%83%e6%98%9f%e4%ba%91" title="查看 哑铃星云 的全部文章" target="_blank">哑铃星云</a></span> </strong><br />
<strong>影像提供与版权: </strong>Bill Snyder</a> (<a href="http://billsnyderastrophotography.com/">Bill Snyder Photography</a>)</p>
<p><strong>说明: </strong><a href="http://en.wikipedia.org/wiki/1764">1764年</a>，<a href="http://www.seds.org/messier/xtra/history/biograph.html">梅西叶(Charles Messier)</a>在无意中发现了我们<a href="http://www.nineplanets.org/sol.html">太阳</a>未来的宿命。在当时，他将一些可能混淆成彗星的迷濛状的天体编了一个目录。在<a href="http://www.skylook.org/apod/ap960626.html">梅西叶的目录</a>中，<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%93%91%e9%93%83%e6%98%9f%e4%ba%91" title="查看 哑铃星云 的全部文章" target="_blank">哑铃星云</a></span>的编号是27，所以现在就称它为<a href="http://www.seds.org/messier/m/m027.html">M27</a>。<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/m27" title="查看 M27 的全部文章" target="_blank">M27</a></span>是<a href="http://www.skylook.org/apod/planetary_nebulae.html">行星状星云</a>，而将来我们<a href="http://asterisk.apod.com/viewtopic.php?f=24&amp;t=18012">太阳</a>核心的<a href="http://fusedweb.pppl.gov/">核融合</a>反应停止后，它也会产生这种星云。 <a href="http://www.skylook.org/apod/ap020302.html">M27</a>位在北天的狐狸<a href="http://www.astro.wisc.edu/~dolan/constellations/extra/constellations.html">座</a> (<a href="http://en.wikipedia.org/wiki/Vulpecula">Vulpecula</a>)内，是夜空中最明亮的<a href="http://www.seds.org/messier/planetar.html">行星状星云</a>之一，透过双筒望远镜就能够找到他的踪影。<a href="http://billsnyderastrophotography.com/?page_id=1767">上图中</a>的M27由<a href="http://en.wikipedia.org/wiki/H-alpha">氢</a>与<a href="http://periodic.lanl.gov/8.shtml">氧</a>所发出的光，大约要用上1000年才会传到我们这里。虽然<a href="http://www.skylook.org/apod/ap100826.html">M27</a>的发现很早，但是了解它所要用到的物理和真正体会到它的重要性，都远超过18世纪的科学知识。甚至到现在，像M27这种<a href="http://www.skylook.org/apod/ap040201.html">双极瓣状的行星状星云</a>，还是有许多无法解释的谜团。这些谜团包括低质量恒星抛出外层气壳的物理机制是什么呢？在卸去它的外层气壳后，恒星的核心就露了出来，形成一颗发出很强<a href="http://science.hq.nasa.gov/kids/imagers/ems/xrays.html">X射线</a>辐射的<a href="http://imagine.gsfc.nasa.gov/docs/science/know_l2/dwarfs.html">白矮星。</a></p>
<p><a href="http://imagine.gsfc.nasa.gov/docs/science/know_l2/dwarfs.html">&nbsp;</p>
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		<title>星系M106的特写(M106 Close Up)</title>
		<link>http://www.richens.net/815.html</link>
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		<pubDate>Thu, 03 May 2012 14:52:15 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[星系M106]]></category>

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		<description><![CDATA[星系M106的特写影像 影像提供: 组合影像数据 &#8211; Hubble Legacy Archive; Adrian Zsilavec, Michelle Qualls, Adam Block / NOAO / AURA / NSF 影像制作 &#8211; André van der Hoeven 说明: 位在大熊座附近，被猎犬座群星所环绕的这个星系，是由身为公制推手的法国天文学家Pierre Mechain在1781年所发现的。后来，他的朋友兼同事梅西叶把它纳入他的编录中，成为M106。近代的深空影像证实它是个宇宙岛；是一个位在我们银河系群星之外，跨度三万光年，离我们只有二千一百光年远的螺旋星系。除了鲜明的尘埃带和明亮的星系核之外，这幅组合影像，突显了星系螺旋臂上的年轻蓝色星团和泛红的恒星诞生区。这幅高解析星系影像， 结合了哈伯望远镜先进巡天相机的清晰照片和地面望远镜的彩色影像数据。M106 (即NGC 4258)是一个邻近的西佛型活跃星系，在电波到X射线等电磁波段都很明亮。据信活跃星的能源，是来自掉进大质量核心黑洞的物质。 &#160;]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/2252200IR.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/2252200IR.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e6%98%9f%e7%b3%bbm106" title="查看 星系M106 的全部文章" target="_blank">星系M106</a></span>的特写影像</strong><br />
<strong>影像提供: </strong><em>组合影像数据 &#8211; </em>Hubble Legacy Archive</a>; <a href="http://www.noao.edu/outreach/aop/observers/m106.html">Adrian Zsilavec, Michelle Qualls, Adam Block</a> / NOAO / AURA / NSF<br />
<em>影像制作 &#8211; </em><a href="http://www.astro-photo.nl/photoblog/index.php?x=startup">André van der Hoeven</a></p>
<p><strong>说明: </strong>位在<a href="http://www.astropix.com/HTML/C_SPRING/BIGDIP.HTM">大熊座</a>附近，被<a href="http://en.wikipedia.org/wiki/Canes_Venatici">猎犬座</a>群星所环绕的这个星系，是由身为<a href="http://www.french-metrology.com/en/history/history-mesurement.asp">公制</a>推手的法国<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%a4%a9%e6%96%87" title="查看 天文 的全部文章" target="_blank">天文</a></span>学家<a href="http://www.seds.org/messier/xtra/history/pmechain.html">Pierre Mechain</a>在1781年所<a href="http://www.seds.org/messier/Mdes/dm106.html">发现</a>的。后来，他的朋友兼同事梅西叶把它纳入他的编录中，成为<a href="http://www.seds.org/messier/m/m106.html">M106</a>。近代的深空影像证实它是个<a href="http://www.skylook.org/apod/ap080124.html">宇宙岛</a>；是一个位在我们银河系群星之外，跨度三万光年，离我们只有二千一百光年远的螺旋星系。除了鲜明的尘埃带和明亮的星系核之外，这幅<a href="http://www.astro-photo.nl/photoblog/index.php?showimage=188">组合影像</a>，突显了<a href="http://www.skylook.org/apod/ap070411.html">星系螺旋臂</a>上的年轻蓝色星团和泛红的恒星诞生区。这幅高解析星系影像， 结合了哈伯望远镜先进巡天相机的清晰照片和地面望远镜的彩色影像数据。M106 (即NGC 4258)是一个邻近的<a href="http://www.skylook.org/apod/ap981023.html">西佛型</a>活跃星系，在电波到X射线等<a href="http://coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_astronomy/">电磁波段</a>都很明亮。据信活跃星的能源，是来自掉进大质量<a href="http://www.cosmotography.com/images/supermassive_blackholes_drive_galaxy_evolution_2.html">核心黑洞的物质。</a></p>
<p><a href="http://www.cosmotography.com/images/supermassive_blackholes_drive_galaxy_evolution_2.html">&nbsp;</p>
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		<title>土衛海倫娜(Saturns Moon Helene in Color)</title>
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		<pubDate>Wed, 02 May 2012 14:19:52 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[Helene]]></category>
		<category><![CDATA[Saturns Moon]]></category>
		<category><![CDATA[土星]]></category>
		<category><![CDATA[天文]]></category>

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		<description><![CDATA[土衛海倫娜 影像提供與版權: NASA/JPL/SSI; Color Composite: Daniel Machácek 說明: 土星海倫娜在任何光線下，顏色都十分神秘。這張衛星影像是去年六月卡西尼號太空船飛越該衛星，距離僅僅一倍地球直徑，拍下了這張細膩影像。與傳統的隕石坑和丘陵比較，這原始且未加修飾的地貌擁有異常的光滑地貌與條紋。行星天文學家仔細的檢視海倫娜的影像，蒐集這個30公里寬的浮動冰山起源資訊。海倫娜的軌道十分異常，因為就在大型土星衛星土衛四(Dione)的上方，如此重力拉扯下而使其位在拉格朗日點這穩定的位置之上，同樣也是在拉格朗日點的衛星還有三顆。 &#160;]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/221954HVx.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/221954HVx.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>土衛海倫娜 </strong><br />
<strong>影像提供與版權: </strong>NASA</a>/<a href="http://www.jpl.nasa.gov/">JPL</a>/<a href="http://ciclops.org/">SSI</a>; <em>Color Composite: </em>Daniel Machácek</p>
<p><strong>說明: </strong><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%9f%e6%98%9f" title="查看 土星 的全部文章" target="_blank">土星</a></span>海倫娜在任何光線下，顏色都十分神秘。這張衛星影像是去年六月<a href="http://saturn.jpl.nasa.gov/spacecraft/overview/">卡西尼號太空船</a><a href="http://www.youtube.com/watch?v=HiHSM-_fes4">飛越</a>該<a href="http://en.wikipedia.org/wiki/Helene_%28moon%29">衛星</a>，距離僅僅一倍地球直徑，拍下了<a href="http://www.planetary.org/blogs/emily-lakdawalla/2012/04201100.html">這張</a><a href="http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20110620.html">細膩影像</a>。與傳統的隕石坑和丘陵<a href="http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap110623.html">比較</a>，<a href="http://www.planetary.org/multimedia/space-images/helene-in-color.html">這</a>原始且未加修飾的地貌<a href="http://www.nasa.gov/mission_pages/cassini/whycassini/cassini20100308.html">擁有</a>異常的光滑地貌與條紋。<a href="http://www.planetary.org/blogs/emily-lakdawalla/2011/3072.html">行星天文學家</a>仔細的檢視<a href="http://en.wikipedia.org/wiki/Helene_%28moon%29">海倫娜</a>的<a href="http://photojournal.jpl.nasa.gov/catalog/PIA12773">影像</a>，蒐集這個30公里寬的浮動冰山<a href="http://www.unmannedspaceflight.com/index.php?showtopic=7293">起源</a>資訊。<a href="http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap951010.html">海倫娜</a>的軌道十分異常，因為就在大型<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e5%9c%9f%e6%98%9f" title="查看 土星 的全部文章" target="_blank">土星</a></span>衛星<a href="http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap070801.html">土衛四(Dione)</a>的上方，如此重力拉扯下而使其位在<a href="http://en.wikipedia.org/wiki/Lagrange_point">拉格朗日點這穩定的位置之上，同樣也是在拉格朗日點的衛星還有三顆。</a></p>
<p><a href="http://en.wikipedia.org/wiki/Lagrange_point">&nbsp;</p>
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		<title>星爆星系IC 10 (Starburst Galaxy IC 10)</title>
		<link>http://www.richens.net/805.html</link>
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		<pubDate>Tue, 01 May 2012 14:39:50 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[Galaxy]]></category>
		<category><![CDATA[Starburst]]></category>
		<category><![CDATA[天文]]></category>

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		<description><![CDATA[星爆星系IC 10 影像提供与 版权: Dietmar Hager, Torsten Grossmann 说明: 在银河系盘面上，藏匿在尘埃与星星后的IC 10，距离我们仅仅2.3百万光年远。尘埃扰动让星系更显暗淡，但不规则的矮星系仍旧透露出红色辉光，意表者该处有大量的星系诞生。事实上，隶属于本星系群的IC 10，是最邻近的星爆星系。然而跟其他本星系群比较，IC10拥有相当多的大质量新星，其中还有包含了拥有黑洞的高能X射线双星系统。IC 10在天空中的位置是仙后座边缘处，大概是5000光年。 &#160;]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/223953ayX.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/223953ayX.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong>星爆星系IC 10 </strong><br />
<strong>影像提供与 版权</a>: </strong>Dietmar Hager</a>, <a href="http://astrogrossi.de/">Torsten Grossmann</a></p>
<p><strong>说明: </strong>在<a href="http://www.skylook.org/apod/ap090926.html">银河系盘面</a>上，藏匿在尘埃与星星后的<a href="http://www.seds.org/messier/xtra/ngc/i0010.html">IC 10</a>，距离我们仅仅2.3百万光年远。尘埃扰动让星系更显暗淡，但不规则的矮星系仍旧<a href="http://www.stargazer-observatory.com/IC10.html">透露</a>出<a href="http://www.skylook.org/apod/ap061123.html">红色辉光</a>，意表者该处有大量的星系诞生。事实上，隶属于本星系群的IC 10，是最邻近的<a href="http://chandra.harvard.edu/xray_sources/starburst.html">星爆星系</a>。然而跟其他<a href="http://www.atlasoftheuniverse.com/localgr.html">本星系群</a>比较，IC10拥有相当多的大质量新星，其中还有包含了拥有<a href="http://arxiv.org/abs/astro-ph/0310039">黑洞</a>的高能<a href="http://www.skylook.org/apod/ap050721.html">X射线</a>双星系统。IC 10在天空中的位置是<a href="http://www.hawastsoc.org/deepsky/cas/index.html">仙后座边缘处，大概是5000光年。</p>
<p><a href="http://www.hawastsoc.org/deepsky/cas/index.html">&nbsp;</p>
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		<title>遨翔于蓝天之上(To Fly Free in Space)</title>
		<link>http://www.richens.net/800.html</link>
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		<pubDate>Tue, 01 May 2012 14:36:09 +0000</pubDate>
		<dc:creator>richen</dc:creator>
				<category><![CDATA[探索]]></category>
		<category><![CDATA[地球]]></category>
		<category><![CDATA[天文]]></category>
		<category><![CDATA[蓝天]]></category>
		<category><![CDATA[遨翔]]></category>

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		<description><![CDATA[遨翔于蓝天之上 STS-41B, NASA 说明: 漂浮在挑战者号航天飞机酬载舱上空一百公尺处的Bruce McCandless，他和和载具的间距，比先前进行太空漫步任何人都来得远。在载人操控器(MMU)的协助下，上面影像的太空人McCandless，自由悬浮在太空中。在1984年航天飞机 41-B任务期间，McCandless和美国航太总署的太空人伙伴Robert Stewart，是首批体验&#8220;无系绳&#8220;太空漫步的太空人。载人操控器靠喷发氮气喷流来进行操控，而常被用来协助卫星的部署和回收。载人操控器 (MMU)的质量高达140公斤，因此在地面上非常沈重。但和其他任何物体一样，一旦漂浮在轨道上，载人操控器是处在无重量状态。最近载人操控器已被简易背包式推进器 (SAFER)所取代。 &#160;]]></description>
			<content:encoded><![CDATA[<p><a href="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/223615NFY.jpg"><img src="http://www.richens.net/wp-content/uploads/auto_save_image/2012/05/223615NFY.jpg" alt="See Explanation.  Clicking on the picture will download  the highest resolution version available." /></a></p>
<p><strong><span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e9%81%a8%e7%bf%94" title="查看 遨翔 的全部文章" target="_blank">遨翔</a></span>于<span class='wp_keywordlink_affiliate'><a href="http://www.richens.net/tag/%e8%93%9d%e5%a4%a9" title="查看 蓝天 的全部文章" target="_blank">蓝天</a></span>之上 </strong><br />
STS-41B</a>, <a href="http://www.nasa.gov/">NASA</a></p>
<p><strong>说明: </strong>漂浮在挑战者号航天飞机酬载舱上空一百公尺处的Bruce McCandless，他和和载具的间距，比先前进行太空漫步任何人都来得远。在<a href="http://www.astronautix.com/craft/shulemmu.htm">载人操控器(MMU)</a>的协助下，<a href="http://grin.hq.nasa.gov/ABSTRACTS/GPN-2000-001087.html">上面影像</a>的太空人McCandless，<a href="http://www.youtube.com/watch?v=92ZRVlKuc0U">自由悬浮</a>在太空中。在<a href="http://www.online-literature.com/orwell/1984/">1984</a>年航天飞机 <a href="http://en.wikipedia.org/wiki/STS-41-B">41-B</a>任务期间，<a href="http://www.jsc.nasa.gov/Bios/htmlbios/mccandless-b.html">McCandless</a>和<a href="http://www.jsc.nasa.gov/Bios/index.html">美国航太总署的太空人伙伴Robert Stewart</a>，是首批<a href="http://www.youtube.com/watch?v=7K5DiKsZhTk">体验</a>&#8220;无<a href="http://www-istp.gsfc.nasa.gov/Education/wtether.html">系绳</a>&#8220;<a href="http://www.skylook.org/apod/ap990801.html">太空漫步</a>的太空人。<a href="http://www.spacetravel.org/space-travel/interactivespacesuit.html">载人操控器</a>靠喷发<a href="http://periodic.lanl.gov/7.shtml">氮气</a>喷流来进行操控，而常被用来协助卫星的部署和回收。<a href="http://en.wikipedia.org/wiki/Manned_Maneuvering_Unit">载人操控器 (MMU)</a>的质量高达140公斤，因此在<a href="http://www.skylook.org/apod/ap070325.html">地面</a>上非常沈重。但和其他任何物体一样，一旦漂浮在轨道上，载人操控器是处在无重量状态。最近载人操控器已被<a href="http://www.skylook.org/apod/ap011002.html">简易背包式推进器 (SAFER)所取代。</a></p>
<p><a href="http://www.skylook.org/apod/ap011002.html">&nbsp;</p>
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