Lumina simulation traced 2 billion years of universe history from first stars

An international team of scientists created the Lumina simulation, which tracks nearly 2 billion years of universe history — from the emergence of the first stars about 45 million years after the Big Bang. The model covers a region with sides of ~1.6 billion light-years, roughly one hundred times larger in volume than earlier simulations. Calculations were performed on the Frontier supercomputer at Oak Ridge National Laboratory, with results published in "Monthly Notices of the Royal Astronomical Society". The simulation showed how radiation from stars ionized hydrogen around galaxies and r...

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