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Smithsonian scientists recreate the universe’s first 2 billion years

So: researchers at the Center for Astrophysics | Harvard & Smithsonian have created Lumina, a vast simulation of the universe’s first 2 billion years. It models how ordinary matter, dark matter and radiation interacted, helping scientists explore how early galaxies formed and changed their surroundings. Spanning a region more than 100 times larger than those in comparable earlier simulations, Lumina also tracks helium reionization as it unfolds. Powered by more than 15,000 GPUs on the Frontier supercomputer, it gives astronomers a powerful way to compare predictions with observations from telescopes such as JWST.
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