2020Bullet Cluster
Chandra · Hubble
Galaxies · 2026
A cluster, and its dark matter

A galaxy cluster whose mass is mostly dark matter. This sonification gives that invisible mass its own track, the way the Bullet Cluster did years earlier.
What you’re hearing
X-ray gas, optical galaxies, and a dedicated dark-matter layer. Listen to dark matter alone to hear the cluster’s hidden scaffolding.
Layers
NASA/CXC/SAO/K. Arcand, SYSTEM Sounds (M. Russo, A. Santaguida)

Perseus Cluster
Black hole waves