Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The all-sky image is shown with the plane of our Milky Way Galaxy running horizontally through the center. Bright x-ray spots near the galactic plane are within our own Milky Way. Over large areas of the sky a general diffuse background of x-rays dominates. Unresolved extragalactic sources also add to this background, particularly above and below the plane.
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