A DESCENT, IN SIX MOVEMENTS
INFALL
You are falling into the remnant of GW231123. Two hundred and twenty-five suns, collapsed into silence. The most massive black hole merger ever detected.
SCROLL TO FALL
01
The Approach
In November 2023, gravitational-wave detectors heard two black holes collide. One weighed a hundred suns. The other weighed a hundred and forty. What remains is a sphere the size of a small city, heavier than a star cluster. From here it is only a smudge of missing stars.
Light passing nearby is already bending. Watch the starfield slide.
Turn on sound to hear the collision itself.
02
The Disk
Captured matter spirals inward at half the speed of light, heated to millions of degrees by friction. One side of the disk races toward you. Relativistic beaming makes it burn brighter and bluer. The other side, receding, dims to ember.
This asymmetry is not artistic license. It is special relativity.
03
The Photon Ring
Close to the horizon, gravity is strong enough to bend light into closed orbits. The thin bright ring you see is starlight, and disk light, that has circled the black hole once, twice, forever.
This remnant turns at 84 percent of the hardest spin relativity permits, and a turning hole drags space around with it. Light thrown with the spin holds an orbit at 571 kilometres; light thrown against it cannot survive inside 1280. The shadow above you is the arithmetic of that difference: five percent narrower than it is tall, flattened along the limb rotating toward you, and sitting six hundred kilometres to the side of the mass casting it.
You are looking at the back of the black hole from the front.
04
Time
Your seconds are stretching. For every heartbeat here, more than a heartbeat passes on Earth. Fall close enough and a minute of yours becomes their year. The universe is speeding up behind you.
Compare the clocks. They will never agree again.
05
The Horizon
There is no surface. No wall. Only a boundary in causality: the radius where every path forward points inward. The sky gathers itself into a shrinking circle above you.
Nothing that crosses returns. Not even light.
Thank you for falling.
Rendered in real time by integrating photon geodesics through the Kerr metric of a black hole spinning at χ = 0.84 — the same physics behind the Event Horizon Telescope images. Based on GW231123, observed by the LIGO, Virgo and KAGRA collaboration on 23 November 2023.
YOUR FLIGHT RECORDER
You came within — kilometres of a place where time stops. At that depth, a year of your life costs Earth —.
- ABOVE THE HORIZON
- — KM
- PEAK VELOCITY
- — × c
- MAX TIME DILATION
- × —
- YOUR TIME / EARTH TIME
- — / —
- YOUR DESCENTS
- 0
- FALLEN WORLDWIDE
- —
WHISPER TO THE SINGULARITY
Anything you drop past the horizon stays there. From your side of it, your words never finish falling — they redshift, slow, and freeze on the boundary. Forever mid-arrival.
Nothing you write is stored, sent, or kept — not by this site, not by anyone. Your words exist on your screen alone, and then past the horizon. Only an anonymous count survives.