https://www.sciencealert.com/researcher ... l-universe
The Uchuu simulation is the largest and most detailed simulation of the Universe ever made. It contains 2.1 trillion 'particles' in a space 9.6 billion light-years across. The simulation models the evolution of the Universe across more than 13 billion years. It doesn't focus on the formation of stars and planets but instead looks at the behavior of dark matter within an expanding Universe.
The detail of Uchuu is high enough that the team can identify everything from galaxy clusters to the dark matter halos of individual galaxies. Since dark matter makes up most of the matter in the Universe, it is the main driver of galaxy formation and clustering.