索伦眼——G1.9+0.3超新星遗迹
http://chandra.harvard.edu/photo/2008/g19/g19.jpg1985X射线图片
http://chandra.harvard.edu/photo/2008/g19/g19_xray_radio.1985.jpg
2008X射线图片
http://chandra.harvard.edu/photo/2008/g19/g19_xray.jpg
双通道
http://chandra.harvard.edu/photo/2008/g19/g19_2pan2.jpg
这张合成照展现了银河系中一颗持续扩展的超新星遗迹，左边的图是名叫G1.9+0.3的超新星遗迹，由NASA的钱德拉望远镜在2007年早期拍摄，颜色为橘色，而颜色为蓝色的部分是由NRAO的VLA在1985年拍摄。两张图片之间尺寸大小的不同明白的证明了遗迹的膨胀，这使得可以估算出遗迹的年龄（大约140年）
The expanding remains of a supernova explosion in the Milky Way are shown in this composite image, on the left, of the supernova remnant G1.9+0.3. NASA's Chandra X-ray Observatory image obtained in early 2007 is shown in orange and the radio image from NRAO's Very Large Array (VLA) from 1985 is in blue. The difference in size between the two images gives clear evidence for expansion, allowing the time since the original supernova explosion (about 140 years) to be estimated.
1985射线照
http://chandra.harvard.edu/photo/2008/g19/g19_radio_1985.jpg
2008射电照
http://chandra.harvard.edu/photo/2008/g19/g19_radio_2008.jpg
银河系中最近的大多数超新星都通过G1.9+0.3超新星遗迹年龄的确认而被发现，天文学家对比07年钱德拉拍摄的X射线照片和85年的射电照片来计算膨胀速率的大小。其大小由另一张08年VLA拍摄的的射电照确认。这些照片间不同的尺寸大小都明确的说明了遗迹在膨胀，这也使得遗迹的年龄被估算为大概140年。
The most recent supernova in our Galaxy has been discovered by determining the age of the supernova remnant known as G1.9+0.3. To determine the age, astronomers tracked how quickly it is expanding, by comparing a radio image from 1985 to a Chandra image taken in 2007. The expansion rate was confirmed with another radio observation with the VLA in 2008. The difference in size between these images gives clear evidence for expansion, allowing the age of the remnant and the time since the original supernova explosion (about 140 years) to be estimated.
呵呵，好久没发自翻图了。。。
URL：http://chandra.harvard.edu/photo/2008/g19/more.html
[ 本帖最后由 江涛 于 2008-5-30 01:38 编辑 ] 很漂亮 140年？还是银河系里？ 好幽怨..............~~~ 真让我想起了《指环王》中的眼睛了
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