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Now, for the first time, astronomers have glimpsed that dawn of the universe 13.6 billion years ago when the earliest stars were turning on the light in the cosmic darkness.Judd Bowman of Arizona State University, lead author of a study in Wednesday's journal Nature, said the signal came from the very first objects in the universe as it was emerging out of darkness 180 million years after the Big Bang.When astronomers tried to figure out why, the best explanation was that elusive dark matter may have been at work.If verified, that would be the first confirmation of its kind of dark matter, which is a substantial part of the universe that scientists have been searching for over decades.Astronomers looked at a specific wavelength.The scientists know little about these early stars.Now that astronomers know where and how to look, others will confirm this and learn more, Bowman said.The research does not establish exactly when these stars turned on, except that at 180 million years after the Big Bang, they were on. Scientists had come up with many different time periods for when the first stars switched on, and 180 million years fits with current theory, said Ellis, a professor at University College London.
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