The Threat of Kessler Syndrome
The number of trackable debris objects in Low Earth Orbit (LEO) has surpassed 40,000. Including fragments between 1-10 cm, the total exceeds 1 million. If debris density reaches a critical threshold, cascading collisions could render entire orbital bands unusable.
International Action
The United Nations Committee on the Peaceful Uses of Outer Space (COPUOS) is promoting international space debris mitigation guidelines. However, these guidelines lack legally binding force. Some countries and companies are taking proactive measures: SpaceX's Starlink satellites are equipped with autonomous collision avoidance systems, and ClearSpace's debris removal mission is scheduled for launch next year.
Technical Solutions
Active Debris Removal (ADR) technologies include: robotic arm capture, laser ablation for deceleration, and magnetic docking. Each approach has advantages, but costs ($10,000-$50,000 per kilogram) remain prohibitively high.