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This is a false-color X-ray image of a field of galaxies as seen in a survey done by the Chandra X-ray Observatory. The image covers a region of the sky about equal to the size of two full-moons. Red corresponds to low-energy X-ray emitting galaxies, green to intermediate energy X-ray galaxies, and blue to objects emitting high energy X-rays - about ten times more energetic than those seen in red. One result apparent in this image, apart from the fact that so many galaxies emit X-rays, is the wide range of galaxy types.
Credit: NASA/Chandra CXO, and B. Wilkes et al.
Low Resolution Image (jpg)
Credit: NASA/Chandra CXO, and B. Wilkes et al.
Low Resolution Image (jpg)
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