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“People Thought This Couldn’t Be Done”: Ground-Based Telescopes Detect Echoes of “Cosmic Dawn” by Peering 13 Billion Years Back in Time

Astronomers report the first successful use of Earth-bound telescopes to peer over 13 billion years back in time to observe conditions in our universe shortly after the Big Bang, which astronomers call ‘Cosmic Dawn.’ High atop the Chilean Andes, a novel array of ground-based instruments has successfully detected faint microwave signals left behind by the universe’s first stars. This discovery pushes the limits of observational astronomy and cracks open one of the most mysterious epochs in cosmic history. The breakthrough, led by a team of Johns Hopkins University astronomers and reported in the Astrophysical Journal, marks the first time Earth-based telescopes isolated these elusive signals

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