A new AI-enhanced simulation models every star in the Milky Way with unprecedented speed and detail. The technique unlocks galaxy-scale realism while also promising major advances in climate and weather modeling. Credit: Shutterstock Researchers led by Keiya Hirashima at the RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS) in Japan, working with partners from The University of Tokyo and Universitat de Barcelona in Spain, have created the first Milky Way