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from NASA: Image of a group of four galaxies that appear close to each other in the sky: two in the middle, one toward the top, one to the upper left. In addition, there is a large bright patch toward the right. The galaxy at the top has a bright reddish core and is surrounded by swirls of blue and purple filaments that travel inward to its bright core, also highlighted by eight diffraction spikes. The galaxy on the left is a mass of purple gas surrounding a dim red core. The mass is made from small clumps, each slightly illuminated. The two galaxies in the middle have two bright, blue cores, surrounded by purple wisps. The bright patch to the right is made from clouds of blue and purple, strung together in filament-like bands. Surrounding the galaxies is a background peppered with red, blue, and purple dots, which are distant stars and galaxies.


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