The Space Debris Dilemma

In January 2025, astronomers mistook Elon Musk's space-launched Tesla Roadster for a asteroid. It took seventeen hours to realize the "near-Earth object" was actually a seven-year-old sports car orbiting the Sun.

We're losing track of what we've sent into space.

This week, Emily sits down with Dr. Jonathan McDowell, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics who has tracked every rocket and satellite launched since the 1940s. A decade ago, there were 1,000 satellites in orbit. Now there are 12,000. In ten years, we could hit 100,000.

Dr. McDowell explains what happens when these objects die: atmospheric burn-up, ocean crashes, graveyard orbits, or trajectories into solar orbit. He discusses why our regulations—rooted in the 1967 Outer Space Treaty—can't keep pace with mega-constellations, and why we need international cooperation and updated policies.

We explore the real risks: collision probabilities in crowded orbits, the environmental impact of using our atmosphere as an incinerator, and public safety concerns around uncontrolled reentries. Dr. McDowell shares his vision for sustainable space practices, including an orbital "recycling plant."

The space debris dilemma isn't just about what's up there—it's about what comes back down, and whether we're ready for it.