Liz Kruesi | Quanta
The news about the first stars in the universe always seemed a little off. Last July, Rennan Barkana, a cosmologist at Tel Aviv University, received an email from one of his longtime collaborators, Judd Bowman. Bowman leads a small group of five astronomers who built and deployed a radio telescope in remote western Australia. Its goal: to find the whisper of the first stars. Bowman and his team had picked up a signal that didn’t quite make sense. He asked Barkana to help him think through what could possibly be going on.
For years, as radio telescopes scanned the sky, astronomers have hoped to glimpse signs of the first stars in the universe. Those objects are too faint and, at over 13 billion light-years away, too distant to be picked up by ordinary telescopes. Instead, astronomers search for the stars’ effects on the surrounding gas. Bowman’s instrument, like the others involved in the search, attempts to pick out a particular dip in radio waves coming from the distant universe.
