在大约1500光年的这个距离上，猎户星云是距地球最近的恒星形诞生地中的一个。这使的猎户-成为天文爱好者和一些不经常观天者的最爱，也是一个用来研究在恒星幼年期恒星的形成方式和行为的典型区域。
在这张复合图象中，猎户的中心区域已经绝对不再是通过以前NASA的钱德拉X射线天文台和哈勃空间望远镜所看到的样子。
在这张图象中的亮点（蓝色和橘黄色）是被一长组的钱德拉天文台在X射线波段所拍到的刚形成的恒星。这些差不多的连续天文台，持续观测了13天，这使的天文学家们能够监测那些年龄在1百万到1千万岁之间类似太阳的具有活力的恒星。
我们所看到的刚成熟的恒星产生耀斑时所释放的X射线强度比起我们现在的太阳要强的多。这说明了我们的太阳在年轻的时候也同样拥有非常多的，激烈的和充满能量的爆发。WISPY丝（粉红色和紫色）是气体和尘埃的云状物，在可见光波段通过哈勃拍摄到的。这些气体和尘埃终有一天在未来新诞生恒星的引力作用下凝聚成圆盘状物体。
At a distance of about 1,500 light years, the Orion Nebula is one of the closest star formation regions to Earth. This makes Orion - a favorite for amateur astronomers and casual sky watchers - an excellent location to study how stars are born and behave during their stellar childhoods.
In this composite image, the central region of Orion is seen as never before through NASA's Chandra X-ray Observatory and the Hubble Space Telescope.
The bright point-like sources (blue and orange) in this image are the burgeoning stars captured in X-ray light by a long series of Chandra observations. These nearly continuous observations, lasting almost 13 days, allowed astronomers to monitor the activity of Sun-like stars between 1 and 10 million years old.
The fledgling stars were seen to flare in their X-ray intensity much more than our Sun does today. This suggests our Sun had many violent and energetic outbursts when it was much younger. The wispy filaments (pink and purple) are clouds of gas and dust as seen by Hubble in optical light. This gas and dust will one day condense into disks of material from which future generations of stars will be born.
自翻
URL：http://spacespin.org/article.php/71008-peering-into-orion-nebula
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[ 本帖最后由 江涛 于 2008-2-25 15:32 编辑 ] |
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