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AI Breakthrough Simulates Milky Way in Just Hours

11/19/2025

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Summary

Story summary

Keiya Hirashima's team at RIKEN's iTHEMS center created the first detailed Milky Way simulation, modeling more than 100 billion stars with AI.
They combined deep learning with physics-based simulations to produce a star-by-star model spanning 10,000 years.
The method reduces computation time, simulating 1 million years in 2.78 hours versus 315 hours previously.
The breakthrough could transform climate science and oceanography by linking small-scale processes to larger systems.

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Story summary

Keiya Hirashima's team at RIKEN's iTHEMS center created the first detailed Milky Way simulation, modeling more than 100 billion stars with AI.
They combined deep learning with physics-based simulations to produce a star-by-star model spanning 10,000 years.
The method reduces computation time, simulating 1 million years in 2.78 hours versus 315 hours previously.
The breakthrough could transform climate science and oceanography by linking small-scale processes to larger systems.