The picture is a composite of images taken through both broad and narrow band filters.
这张图片是由宽带滤波器和窄带滤波器所拍摄的照片所合成的。
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The Hubble image is a composite of exposures through narrow-band filters, presenting emission from nitrogen, hydrogen, and oxygen atoms in the nebula as red, green, and blue hues.
Using Photoshop lens correction filters to adjust the perspective and some manual skewing and tweaking I was able to create the composite background texture reasonably fast.