It's a composite of X-ray (Chandra) and radio (VLA) photographs of the core of galaxy cluster Abell 400. The blue cloud is a diffuse X-ray glow that pervades the cluster, and the two bright dots are a pair of supermassive black holes that are orbiting each other. The pink wisps are energetic jets of matter that are expelled from the black holes' accretion disks along the axial direction of the holes' rotation. Sometime in the distant future, the two holes will spiral towards each other and merge, emitting an extraordinarily powerful burst of almost undetectable gravitational waves. Links with more info here and here.
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wishing i really could turn on my improbability drive and explore the whole damn universe!
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