Around the Earth is the moon and a lot of space junk.
And it is not an exaggeration: we have decades launching satellites into space without a clear or unified strategy. Of those waters, these muds: only Starlink has 9,000 units orbiting and has requested permission to launch a million more. What began with a technological race between superpowers has become an orbiting dump that has serious implications: threat of catastrophic collisions (every time we launch something, we buy another ticket in this macabre lottery) to risk critical infrastructures such as GPS navigation or communications.
But all this is not new: science has been warning about it for years. The truly disturbing thing is not so much that the problem has been diagnosed, but rather that there is no simple solution. Space debris will not degrade with rain nor will it be decomposed by microorganisms. What goes up, stays there. And everything that remains is a real threat to what is there that truly matters.
Almost half of what is in orbit is garbage. The engineering company Accu has used public data of the United States Space Corps through the web Space-Track.org and has analyzed them: there are 33,269 trackable objects in orbit, of which 17,682 are satellites. What happens to that other 47%? What is space debris: abandoned rockets, dead satellites and thousands of fragments resulting from collisions, among other unidentified objects. Stay with this information, because it is important and we will return later.
Why is it important. From high school physics: we have already seen that there are objects of all types and sizes, but the majority of them they travel At more than 27,000 km/h and that speed, even the smallest piece can be lethal. To put it in context: a one-kilogram fragment impacting at 10 km/s has a kinetic energy of 50 MJ, that is, its equivalence in TNT There are 12 kg of explosive, enough to completely destroy an entire satellite of several tons.
Losing a satellite is not the worst thing that could happen (even if its function was critical), but the Kessler syndromean irreversible chain reaction: if two objects collide and generate thousands of fragments, these fragments can collide with each other, generating more and more until making the orbit unusable.
Context. It all started with the launch of Sputnik 1 in 1957, but the problem has gotten out of hand in the last decade due to something that a priori was good: the cost of launches has plummeted, so there are more and more and in fact, there are even commercial constellations, like Starlink. Only between 2020 and 2025 the number of trackable objects in orbit grew by around 10,000 units. You can see the history of all objects launched into space in Space-Track.org.
Maybe after hearing so much that the wolf is coming we downplay it, but it is already happening: in 2024 the astronauts of the International Space Station they had to take refuge after the fragmentation of a decommissioned Russian satellite. In 2025 Chinese astronauts they were trapped at Tiangong Station after a piece of trash cracked the window of their return capsule.
The worst is what we don’t know. We mentioned before that 47% of space debris, but that is only what we can see: the European Space Agency calculate that there are more than 1.2 million fragments larger than one centimeter in orbit and that more than 50,000 exceed 10 centimeters, enough size to completely destroy an active satellite if both impact. The figure amounts to more than 100 million objects of one millimeter or less, according to NASA. Even a flake of paint. In addition, each space power manages its own tracking data with different levels of transparency, making it difficult to have a complete and reliable picture, a map of what is in orbit.
The gap between what is trackable and what is real is abysmal: current surveillance systems can only reliably track objects larger than 10 centimeters in low orbit and larger than one meter in geostationary orbit. Everything that remains outside that threshold is simply invisible, not innocuous. As if that were not enough, there is one more dynamic variable to introduce into the equation: the interaction between debris and space weather. A 2025 study warned that an intense solar storm could cripple satellites’ ability to maneuver long enough to cause cascading collisions and that there would be less than three days to react.
Whose fault is it. The origin of space debris is essentially concentrated in three blocks: China, the United States and the countries of the Commonwealth of Independent States, heirs of the Soviet space program, concentrate on their shoulders about 95% of all waste cataloged in orbit. With data from March 2026, China accounts for 34% of the total debris tracked, closely followed by the CIS (Russia and eight other small countries) with 31% and the United States with another 31%.
The underlying problem is legal: the international treaty that regulates space dates back to the 1960s and does not prohibit destroying satellites with missiles. Nor has anyone been serious about minimizing the launches. Without a clear policy to reduce waste, verification mechanisms or real sanctions, little can be expected, such as documents the UN.
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Cover | Photo of Javier Miranda in Unsplash
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