Astronomy
Using Gravitational Wave Astronomy to Study Black Hole Mergers
Quick fact
The first direct gravitational wave detection, GW150914, was so powerful that it briefly radiated more energy than all the stars in the observable universe combined.
Why this is interesting
Imagine two black holes spiraling into each other, shaking the very fabric of space and time. But how can we possibly detect ripples in spacetime that are smaller than the width of a hair?