Meet ASTRID, the New High-Resolution Cosmological Simulation

This visualization shows the ASTRID simulation at z=0, or the present. The black and white background image is dark matter density. The blue zoom-in box shows the most massive dark matter halo in ASTRID. The red zoom-in box shows the region around a dark matter halo, with the red circle showing a star-forming halo. Image Credit: ASTRID/Zhou et al. 2026. ApJ.

The ASTRID cosmological simulation has run from the Universe's early days up to the present day, z=0. ASTRID is larger than some other simulations, and smaller than others. But with a higher number of particles, it has higher-resolution than its fellows. Among other things, this can tell astronomers where to look for gravitational waves from black hole mergers with future GW observatories.

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