本帖最后由 江涛 于 2009-11-28 21:14 编辑
A star's spectacular death in the constellation Taurus was observed on Earth as the supernova of 1054 A.D. Now, almost a thousand years later, a super dense object -- called a neutron star -- left behind by the explosion is seen spewing out a blizzard of high-energy particles into the expanding debris field known as the Crab Nebula. X-ray data from Chandra provide significant clues to the workings of this mighty cosmic "generator," which is producing energy at the rate of 100,000 suns.
This composite image uses data from three of NASA's Great Observatories. The Chandra X-ray image is shown in blue, the Hubble Space Telescope optical image is in red and yellow, and the Spitzer Space Telescope's infrared image is in purple. The X-ray image is smaller than the others because extremely energetic electrons emitting X-rays radiate away their energy more quickly than the lower-energy electrons emitting optical and infrared light. Along with many other telescopes, Chandra has repeatedly observed the Crab Nebula over the course of the mission's lifetime. The Crab Nebula is one of the most studied objects in the sky, truly making it a cosmic icon.
位于金牛座的A星的壮观死亡现象就是于1054年被人们观察到的超新星遗迹。几乎是1000年后，一个超级密集的对象-被称为中子星-爆炸后的背景，也就是我们现在熟知的蟹状星云是其喷射出的高能粒子形成的区域。从钱德拉提供重要线索来看，这个强大的宇宙“发电机的运作”，产生了相当于10万个太阳的所产生能量。
这张合成图像使用来自美国宇航局的大天文台三个数据。钱德拉X射线图像显示为蓝色，哈勃太空望远镜的光学图像显示为红色和黄色，斯皮策太空望远镜的红外图像显示为紫色。 X -射线图像比其他几张图像小是因为X射线发射的电子能量辐射比起可见光和红外所发送的大的多，因此能量损耗更多。同许多其他望远镜一样，钱德拉曾多次观察一生中的蟹状星云。蟹状星云是天空中研究最多的对象之一，真正使之成为宇宙图标
自翻，图片和文字信息均来自钱德拉网站
URL：http://chandra.harvard.edu/photo/2009/crab/
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