Astronomy
The Gravitational Wave Background from Merging Supermassive Black Hole Binaries
Quick fact
The gravitational wave background from merging supermassive black hole binaries produces a faint, persistent signal that was first detected in 2023 by pulsar timing arrays, revealing a constant hum across the universe.
Why this is interesting
When two galaxies collide, the black holes at their cores are summoned into an inevitable dance. What happens when they finally meet?