PBS Space Time PBS Space Time

Are We Running Out of Space Above Earth?

Sep 18, 2026 · 21m

Summary

This PBS Space Time episode examines the growing threat of space debris, using the recent reentry of a Chinese Long March 5 rocket as a starting point. The hosts explain Kessler Syndrome, a potential chain reaction of collisions that could render low Earth orbit unusable, and analyze how orbital decay and improved tracking serve as critical mitigating factors. The discussion highlights the risks posed by massive satellite constellations like Starlink and explores emerging technologies for active debris removal. The episode concludes with a Q&A segment addressing listener questions about the…

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