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FYI the NASA image will not look so spectacular if you ever happen to see it through a telescope. To make such an image, the same object is snapped by different types of cameras each of which can take photo in only one particular part of the Electromagnetic wave spectrum like x-ray, gamma ray, infra red and visual light. This is because objects like stars radiate energy over the entire electromagnetic spectrum.
Because the human eye cannot see any other type of electromagnetic waves the other frequencies are mapped into the visual spectrum by some color. so the variations in x-ray for example would be seen as variations in blue color.
THe information from all such frequencies is superimposed on the image taken by ordinary camera and the result is pretty much spectacular 
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