13,486 Tonnes of Space Junk Threaten Earth Orbit as 36,000 Large Debris Pieces Multiply
Updated
Updated · The Conversation · Jun 30
13,486 Tonnes of Space Junk Threaten Earth Orbit as 36,000 Large Debris Pieces Multiply
1 articles · Updated · The Conversation · Jun 30
Summary
13,486 tonnes of debris now circle Earth, including about 36,000 objects larger than 10 centimetres, raising collision risks for satellites and other critical infrastructure.
7 kilometres per second is the typical speed in low Earth orbit, meaning one impact can shatter a spacecraft and trigger the cascading Kessler syndrome that could render some orbital regions unusable.
The threat is already operational: the International Space Station performs avoidance manoeuvres at least once a year, while at least one Starlink satellite burns up in the atmosphere daily, adding soot and alumina that can affect the ozone layer.
Cleanup options include active debris removal using nets, magnets, tethers and harpoons, plus design changes such as refuelling spacecraft or building them for longer life or faster de-orbiting, though few removal systems have been proven in space.
Policy is tightening from a 25-year to a 5-year post-mission disposal standard, but no global space traffic management system exists as launches surge and megaconstellations expand.
Will our thirst for satellite internet trigger a debris cascade, trapping humanity on Earth?
Are thousands of burning satellites creating an unregulated experiment that could permanently alter our climate?
Is the glare from thousands of new satellites blinding us to cosmic threats and the universe itself?
The Growing Peril of Space Debris: Key Metrics, Kessler Syndrome, and the Future of Orbital Sustainability
Overview
The report highlights the urgent challenges facing Earth's orbital environment, starting with the Shenzhou-20 spacecraft being struck by debris, which forced China to postpone its return. This incident underscores the unpredictable and growing threat of space debris. Experts like Moriba Jah emphasize the need for international standards and better management practices. The scale of the problem is immense, with over 40,000 catalogued objects and many more untracked, making the risk of collisions ever higher. The report calls for global cooperation, improved policies, and new technologies to ensure the sustainability and safety of future space operations.