Artist's rendering of how the first stars in the universe may have looked | N.R.Fuller, National Science Foundation

Dark Matter May Have Kept the Early Universe Cool

Astronomers have detected hydrogen formed just 180 million years after the Big Bang. But the gas is much colder than theoretical predictions.

A timeline of the universe, updated to show when the first stars emerged. This updated timeline of the universe reflects the recent discovery that the first stars emerged by 180 million years after the Big Bang. The research behind this timeline was conducted by Judd Bowman of Arizona State University and his colleagues, with funding from the National Science Foundation. | N.R.Fuller, National Science Foundation
EDGES ground-based radio spectrometer, CSIRO’s Murchison Radio-astronomy Observatory in Western Australia | CSIRO Australia
National Science Foundation