Where does all of the infrared light come from?
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A team of astronomers have reportedly solved one of astronomy’s most persistent problems: where does all of the infrared light come from?
The University of California at Irvine study, which utilized data from NASA’s Spitzer Space Telescope, finds that the persistent infrared light seen across the entire night sky is the result of stars found just beyond the edge of galaxies. These stars are thought to have once belonged to the galaxies before violent galaxy mergers stripped them away into the relatively empty space outside of their former galaxies.