Cosmic Vortex: How Void Rotation Reveals the Universe's Composition
330 billion dark matter particles move in a cube 8 h⁻³ Gpc³ across — the arsenal of the AbacusSummit simulations, recreating the evolution of an expanding universe.
Galaxy Rotation in Voids Tests Inflation
In the nearly empty regions of space, galaxies spin in unison, like dancers in the same troupe. This dance creates a difference in light from opposite sides: on one side stretching, on the other compression. This optical shift has become a probe of the first moments after the Big Bang.