AI Summary

Researchers at the Center for Astrophysics Harvard & Smithsonian have built “Lumina,” a massive simulation that models the interaction of ordinary matter, dark matter and radiation during the universe’s first two billion years. The model, described in a paper in Monthly Notices of the Royal Astronomical Society, is among the largest and most detailed reconstructions of the early cosmos to date. By comparing Lumina’s predictions with observations from the James Webb Space Telescope, the Nancy Roman Space Telescope and other instruments, astronomers can test whether current theories of post‑big‑bang evolution hold up or need revision.

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