Space governance you can step inside.
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Atlas · Timeline
How orbit outgrew its rulebook.
In one lifetime the sky went from two objects to more than thirty-four thousand tracked pieces. Scroll the real catalogue, milestone by milestone, and watch the rules arrive a step behind the hardware every time.
The first object
On 4 October 1957 Sputnik 1 reached orbit, and the rocket that lifted it got there first: catalogue number one is the spent stage, not the satellite. Two objects, and one was already junk. Nothing yet said what could go up, or who answered for what stayed.
Coordination No framework at all. The question of who governs space had barely been asked.
A rulebook for an empty sky
The Outer Space Treaty entered into force on 10 October 1967. Space is the province of all humankind, no nation may claim it, and every state stays responsible for the objects it launches. It set principles for a nearly empty sky, not traffic rules for a crowded one.
Coordination The foundational bargain, and still binding. It says nothing about congestion, debris, or how two operators share a lane.
Ladder 4
Kessler's warning
Donald Kessler and Burton Cour-Palais showed how one collision seeds the next: debris begets debris until some orbits turn hostile. By the year they published, most tracked objects were already spent rockets and fragments, not working satellites. The warning was early. The response was not.
Coordination A scientific alarm, not a rule. Debris-mitigation guidelines were decades away, and would arrive only as voluntary advice.
One test, a lasting scar
China destroyed its own Fengyun-1C weather satellite with a missile, spawning more than 3,000 tracked fragments: the worst single debris event of the space age. In one afternoon it raised the world's trackable population by about a quarter, and most of that wreckage is still up there.
Coordination Condemnation followed. No binding consequence did, because no rule forbade the act.
+ 3,000 tracked fragmentsLadder 1
The collision nobody prevented
An active Iridium telephone satellite and a dead Russian Cosmos slammed together near 789 kilometres at almost twelve kilometres a second: the first accidental collision of two whole satellites. It added about 2,000 tracked fragments to an orbit with no one directing traffic.
Coordination Nobody could move the dead satellite, and no shared warning was acted on. There was no controller to call.
+ 2,000 tracked fragmentsLadder 0
The megaconstellation era
As the first megaconstellations began to climb, Europe's Aeolus satellite fired its thrusters to dodge a Starlink. The two operators never agreed between them who should move. Thousands of new satellites were arriving into rules of the road that did not exist.
Coordination One side swerved, and neither had agreed to. The near miss became a reference case for operator-to-operator norms.
Ladder 1
A test, and a shelter order
Russia destroyed its defunct Cosmos 1408 with a missile, throwing off more than 1,500 tracked fragments. The debris crossed the International Space Station's path, and its seven crew sheltered in their return craft while the cloud swept by.
Coordination In 2022 the United States pledged never to run destructive anti-satellite tests, and a UN resolution urged others to follow. A norm forming after the damage, not before.
+ 1,500 tracked fragmentsLadder 3
The crowd no one governs
The catalogue now tracks 34,683 objects, and for the first time working satellites outnumber the wreckage, thanks almost entirely to one constellation. Starlink alone flies about two-thirds of every active spacecraft, and its satellites dodge each other hundreds of thousands of times a year. The 1967 treaty still governs. The traffic rules still do not exist.
Coordination This is the gap Diplo Space works in: the sky has outgrown its rulebook. See it live in the globe, or check any event against the record.
1957
1 satellite on orbit
2 objects counting spent rocket bodies
SatellitesRocket bodiesDebris-generating event
The tracked catalogue
- 150%Satellitesactive + dead
- 150%Rocket bodiesspent stages
- 00%Debrisfragments adrift
Most of what is up there is still working hardware. The crowd, and the rules, come later.
Data & method
What the curve is, and isn’t.
Real catalogue, real curve
The rising area is the count of satellites and rocket bodies on orbit at each year-end, computed from the public satellite catalogue as launches minus decays. Each object is dated by its own launch, so this part is accurate history.
Debris is marked, not drawn
Fragments from a break-up carry their parent’s launch date in the catalogue, so a debris line would put the 2007, 2009, and 2021 events in the wrong years. We mark those events at their true dates instead, with the tracked-fragment counts each is known for.
A reading, not a verdict
The coordination note on each chapter is a Diplo reading of where a response landed on the record’s ladder, drawn from primary sources. It describes what happened, and takes no policy position on what should.
Catalogued objects on orbit at each year-end, by type. Real data; a visualization of the public catalogue's growth, not every object ever launched. Source: CelesTrak SATCAT (on-orbit population by year, launches minus decays).