Space Debris
The Graveyard Above Us Is Getting Crowded
There are roughly 27,000 tracked pieces of debris orbiting Earth right now, and tens of millions more too small to follow — and every one of them is travelling faster than a bullet.
The Idea
The problem with space debris isn't just that it exists. It's that it self-multiplies. In 1978, NASA scientist Donald Kessler described a scenario that now carries his name: if orbital debris reaches a certain density, collisions start producing more debris, which causes more collisions, in a cascade that could eventually render certain orbits permanently unusable. Not for decades — for centuries. The Kessler Syndrome is less a prediction and more a threshold we are edging towards without fully agreeing on where it sits. What makes this genuinely hard is the geometry of the problem. Low Earth orbit — the band between roughly 200 and 2,000 kilometres up, where most satellites, the International Space Station, and the bulk of debris live — isn't infinite. It's a shared resource, like a public road, but with no traffic laws, no enforcement mechanism, and operators from dozens of countries and private companies all adding vehicles simultaneously. A defunct Russian satellite and an Iridium communications satellite collided in 2009, producing over 2,000 new trackable fragments in a single event. That collision was entirely predictable in hindsight; no one had the coordination infrastructure to prevent it. The physics compounds the politics. At orbital velocities, a paint fleck can damage a spacecraft window. A one-centimetre fragment carries the kinetic energy of a small explosive. And debris doesn't conveniently fall away — in the higher reaches of LEO, an object can remain in orbit for hundreds of years before atmospheric drag brings it down.
In the World
In April 2021, China launched the core module of its new space station, Tianhe. Within weeks, operators at NASA were issuing warnings: fragments from a Chinese Long March rocket body were drifting into a conjunction — a predicted close approach — with the station. It was one of three emergency manoeuvres the International Space Station crew had to perform that year alone to dodge debris. But the single most striking illustration of where this is heading comes not from a collision, but from a business plan. Between 2019 and 2023, SpaceX launched over 4,000 Starlink satellites. Amazon, OneWeb, and others are planning tens of thousands more. The pitch is compelling — global broadband coverage, meaningful for underconnected regions. The side effect is that LEO is filling up faster than any regulatory framework anticipated. The ITU, the UN body that nominally governs orbital slots, was designed for an era when launching a satellite required a nation-state's resources. Its rules struggle to keep pace with a private company that can put up 60 satellites in a single launch. Astroscale, a Japanese company founded in 2013, is one of a small number of firms actively developing debris removal technology — magnetic capture systems, harpoons, nets. In 2021 they demonstrated a servicer satellite that could rendezvous with and magnetically dock to a target object. It worked. The technology exists. What doesn't yet exist is a funding model for cleaning up debris that no one currently owns, and that no one is legally required to remove.
Why It Matters
This isn't an abstract engineering problem. The services that GPS, weather forecasting, disaster response, and global communications depend on all run through satellites in orbit. If key orbital shells become too debris-dense to safely operate in, the downstream effects on how we navigate, communicate, and monitor the planet would be significant and not easily reversed. But the deeper issue is one worth sitting with: this is a commons problem in the most literal sense. No individual actor has sufficient incentive to clean up debris they didn't create. No international body has the authority to compel them to. And the window for collective action — before the cascade dynamics become self-sustaining — is not indefinitely open. Space debris is a remarkably clean case study in what happens when technology races ahead of governance. Understanding that dynamic — not just in orbit but in the broader pattern of how transformative technologies tend to outpace the institutions meant to manage them — is one of the more useful lenses you can carry into the next decade of news.
A Question to Ponder
If the orbit above Earth is a shared resource that everyone depends on but no one owns, who should bear the cost — and responsibility — of keeping it usable?
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