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Plasma Tunnels Reveal How Dying Satellites Really Fall to Earth

Aluminum ash from satellites’ reentry may alter the atmosphere

Aluminum ash from satellites’ reentry may alter the atmosphere

Tereza Pultarova

Tereza Pultarova is a London-based journalist specializing in aerospace and defense technologies.

Close-up of a burnt metal cylinder. Its exterior is charcoaled, but the center appears mostly in-tact.

Researchers in Germany are simulating in the lab a satellite’s reentry into the atmosphere—revealing new dangers posed by many more reentries to come from today’s growing fleets of satellite constellations.