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    Japanese supercomputer simulations may explain Webb’s Little Red Dots

    September 17, 2026, Categories  Astronomy/Space

    Japanese supercomputer explains Webb's Little Red Dots
    Visualization of the simulation by ATERUI III showing a rapidly growing black hole surrounded by gas. Red indicates areas of higher temperature. Credit: Sunmyon Chon, Takaaki Takeda, 4D2U Project, NAOJ

    Of all the discoveries from the James Webb Space Telescope, the multitude of Little Red Dots it has observed is among the most enigmatic. Now, simulations using the Japanese Supercomputer ATERUI III have explained the nature of the Little Red Dots without requiring any exotic assumptions. The simulations show that the Little Red Dots are black holes growing at a rate that would be impossible today because of conditions in the early universe.

    In the study, published in the journal Nature, a research team led by Sunmyon Chon at the Max Planck Institute for Astrophysics used the ATERUI I...

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