Space governance you can step inside.
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Atlas
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 catalog, 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: catalog 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 largest cataloged debris-generating event on record. In one afternoon it grew the cataloged debris population in low Earth orbit by more than a third, and roughly two-thirds of that wreckage is still cataloged on orbit.
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 kilometers at almost twelve kilometers 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 one acted on a shared warning. 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 move. 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 until the cloud had passed.
Coordination In 2022 the United States committed not to conduct destructive direct-ascent anti-satellite missile tests, and a UN resolution urged others to follow. A norm forming after the damage, not before. Two other kinetic tests, a US intercept in 2008 and an Indian test in 2019, were run low enough that their debris decayed within months, which is why they leave no lasting mark on this curve.
+ 1,500 tracked fragmentsLadder 3
The crowd without traffic rules
The catalog now tracks 35,037 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.
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 Space 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.
Cataloged objects on orbit at each year-end, by type. Real data; a visualization of the public catalog's growth, not every object ever launched. Source: CelesTrak SATCAT (on-orbit population by year, launches minus decays).