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Colliding galaxies, artwork
Colliding galaxies. Artwork of colliding galaxies (white) based on Spitzer Space Telescope (SST) infrared observations. It is thought that the interaction of these galaxies is responsible for what are known as 'giant galactic blobs' (red). The blobs, first identified about five years ago, are mammoth clouds of intensely glowing material (11 billion light years from Earth). The blobs can be seen in visible light, but infrared observations were needed to uncover the galaxies within the blobs. The observations also found other nearby blobs, also associated with powerfully colliding galaxies.
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