Policy & Sustainability

The guidelines and practices meant to limit the creation of new debris — deorbiting satellites at end of life, venting spent rocket stages so they cannot explode, and clearing valuable orbits within a set number of years after a mission ends.

The regulation of space technologies that have both civilian and military uses — rockets, sensors, and satellites — controlling their transfer across borders. It shapes who can build and buy space hardware, and is a persistent tension in the global space industry.

The regulatory approval a national authority requires before a launch, covering public safety, liability insurance, and environmental review. It is the gate through which every launch must pass, and a major point of national space governance.

The deployment of constellations of thousands of satellites in low Earth orbit to provide global broadband. They transform the economics of space but sharply raise concerns over orbital traffic, collision risk, radio-frequency use, and the brightness of the night sky for astronomy.

The growing population of defunct satellites, spent rocket stages, and fragments of past collisions and explosions that circle the Earth. Travelling at kilometres per second, even a small piece can destroy an operational spacecraft, and there are millions of untracked fragments.

The international policy framework — coordinated by COSPAR — that keeps missions from contaminating other worlds with terrestrial microbes, and Earth from any hazard in returned samples. It turns the science of planetary protection into binding mission requirements.

The unsettled question of who may extract and own resources from the Moon and asteroids, and under what rules. The Outer Space Treaty forbids claiming territory, but says little about mining, and nations are now enacting their own laws — a live and contested frontier of space law.

The tracking and cataloguing of the tens of thousands of objects in orbit, and the prediction of close approaches, so that operators can be warned and collisions avoided. It is the sensing foundation on which any traffic management must rest.

The coordination of spacecraft operations — who moves, when, and how — to prevent collisions as orbits grow crowded. Unlike air or sea traffic, space has no established global authority to direct it, making it an urgent and unsolved governance problem.

The international coordination of the radio-frequency spectrum satellites use and the orbital slots they occupy — especially the crowded geostationary arc — managed through the International Telecommunication Union to prevent interference.

The scenario, named for Donald Kessler, in which the density of objects in orbit becomes high enough that collisions cascade — each impact creating more debris that causes further impacts — potentially making some orbits unusable for generations.