The space explosion is still a mystery to science today. We’re pretty much sure it happened – but we still don’t know exactly what triggered it and how long it lasted. Our current vision is that after the explosion more than 13 billion years ago, the Universe has grown to many billions of fractions of a second, and traces of this terribly rapid expansion are still present in the Universe: this is when the nuclei of the later stars were born. , galaxies and other structures have sprouted.

Thus, by mapping the arrangement of galaxies, we can also make the fingerprint of expansion visible. To perform this incredibly complex and computationally demanding task, the National Astronomical Observatory of Japan (NAOJ) has called in the ATERUI II supercomputer: Japanese researchers aim to reconstruct the expansion process with simulations and spin back time to galaxies (formation).

The ATERUI II supercomputer (source: NAO)

Scientists have created 4,000 simulated galaxies and compared them with data for the galaxies to select the expansion model that best fits the data and provides the most accurate explanation for the changes. This method is surprisingly effective: Japanese researchers say it can significantly reduce the amount of data needed to verify expansion models and reduce observation time to a fraction of the time to survey galaxy data. news from the world of IT by clicking here

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