यूरोपीय अंतरिक्ष एजेंसी (ESA) की एक नई रिपोर्ट ने अंतरिक्ष कचरे और टक्कर के जोखिमों के बारे में गंभीर चिंताएं उठाई हैं। 2013 की फिल्म 'ग्रेविटी' ने केस्लर सिंड्रोम को लोकप्रिय बनाया है—NASA के वैज्ञानिक डॉनल्ड केस्लर और बर्टन कोर्प-पाले द्वारा प्रस्तावित एक श्रृंखला टक्कर परिदृश्य—but the situation has escalated since then. Active satellites have surged from ~1,000 to ~17,000, driven largely by SpaceX's Starlink constellation (~11,000 satellites), with Amazon, Chinese constellations, and proposed orbital data centers adding thousands more.

Experts opinions diverge sharply. University of Texas professor Moriba Jah warns orbits will become unusable due to saturation, predicting loss of human life within a decade from reentering debris or spacecraft collisions. Conversely, SpaceX founder Elon Musk maintains space is vast and collisions unlikely, stating satellites are too tiny to see relative to Earth.

ESA's annual Space Environment Report provides the most credible assessment. The agency has tracked global space activities for a decade to evaluate sustainability. This year's report reveals striking and concerning changes, suggesting the truth lies between extreme optimism and pessimism. The growing congestion in low-Earth orbit demands urgent attention to preserve long-term spaceflight viability.