Astronomers have detected the faintest millimeter-wave source ever observed. By accumulating millimeter-waves from faint objects throughout the Universe, the team finally determined that such objects are 100 percent responsible for the enigmatic infrared background light filling the Universe. By examining optical and infrared images, the team found that 60 percent of them are faint galaxies, whereas the rest have no corresponding objects and their nature is still unknown.
via Science Daily
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