https://phys.org/news/2018-06-supercomputer-astronomy.html

ATERUI II is a massive parallel supercomputer and the 5th generation of systems operated by the National Astronomical Observatory of Japan (NAOJ). Linking forty thousand cores allows ATERUI II to calculate rapidly. ATERUI II has three times better performance than the previous "ATERUI" system. A high-speed network enables astronomers to access ATERUI II from their home institutes. In this year, about 150 researchers will use ATERUI II.

With its superior computational capability, ATERUI II will tackle problems too difficult for previous computers. For example, ATERUI II is able to calculate the mutual gravitational forces among the 200 billion stars in the Milky Way Galaxy, rather than bunching them into groups of stars the way other simulations do. In this way ATERUI II will generate a full-scale high-resolution model of the Milky Way Galaxy.