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This stunning picture of the supernova remnant Cassiopeia A is a composite of images taken by three of NASA's Great Observatories. Infrared data from the Spitzer Space Telescope are coloured red; optical data from the Hubble Space Telescope are yellow; and X-ray data from the Chandra X-ray Observatory are green and blue.
这张令人叹为观止的超新星残骸Cassiopeia A的图片是美国宇航局三个大天文台各自的图片拼合而成的。Spitzer太空望远镜的红外线数据显示为红色，哈勃太空望远镜的光学数据显示为黄色，而钱德拉天文台的X射线数据则是绿色和蓝色。
