Every year, retired satellites are intentionally plunged into Earth’s atmosphere to burn up. This practice prevents hardware from adding to the debris in an already congested low-Earth orbit (LEO). Yet the fiery disposal method could be creating a new environmental challenge. Japanese space company Astroscale has launched a collaborative project to figure out exactly what happens to those vaporizing metals and how they affect the climate.
The Atmospheric Impact of Reentered Spacecraft (AIRS) initiative brings together Astroscale, Earth-observation operator Planet Labs, and the University of Southampton. Their combined goal is to solve a major blind spot in atmospheric science.
When a spacecraft re-enters the atmosphere, extreme heat melts and vaporizes its components. This process releases chemical compounds, such as aluminum oxides and black soot, high into the stratosphere. Recent scientific studies warn that these particles linger in the upper atmosphere, potentially depleting the ozone layer and altering global temperature balances.
Researchers struggle to measure this pollution accurately because they lack basic data. Most current computer simulations rely on guesswork. Commercial satellite manufacturers typically keep their engineering blueprints and material lists private to protect their business interests.
The AIRS project offers a compromise. Space operators can share their non-proprietary design information, such as general material composition and weight breakdowns, through confidential agreements. Academics get the real-world data they need to build accurate pollution models, and companies protect their trade secrets.
“Spacecraft reentry has long been treated as an optimal mission endpoint, but it is increasingly clear that we need a deeper scientific understanding of what happens during this phase,” said Mike Lindsay, Chief Technology Officer at Astroscale. “By enabling industry to contribute real-world data in a trusted way, AIRS removes critical barriers for atmospheric research.”
The project highlights a shift in how the aerospace sector views sustainability. While the AIRS initiative addresses a genuine environmental threat, it also serves a clear strategic purpose for Astroscale. The company already specializes in orbital debris removal and satellite servicing. By organizing the scientific research on reentry pollution, Astroscale is setting the stage for future industry standards. If environmental regulations eventually force companies to change how they dispose of old satellites, Astroscale will be well positioned to offer the required commercial solutions.
For now, the partnership gives climate scientists their first clear look at the environmental cost of a rapidly growing space economy.