As thousands of satellites continue to launch into Earth’s orbit, an unexpected environmental issue is coming into focus: pollution caused by deorbiting satellites. When these spacecraft reach the end of their lifespan, they typically burn up upon re-entry into Earth’s atmosphere. But this fiery descent doesn’t come without consequence.
Recent studies suggest that satellite re-entry is releasing heavy metals like aluminum, copper, and lithium into the upper atmosphere. While the long-term effects are still being researched, early findings raise concerns about ozone layer damage and atmospheric chemistry disruption.
With satellite numbers projected to grow from 8,000 today to over 100,000 in the coming years — thanks in large part to mega-constellations like Starlink and Kuiper — the problem is only getting worse.
One-and-Done Satellites: A Broken Model
Most satellites today are designed for single-use missions. Once they run out of fuel or experience hardware failure, they’re either deorbited or left to drift as space debris. This “disposable” design philosophy creates a steady stream of atmospheric re-entries — and with them, pollution.
“It’s sort of crazy,” says Arkisys co-founder Dave Barnhart, noting that space technology hasn’t adopted the principles of sustainability we demand in other industries.
So what’s the solution? Many experts believe it’s time for a major shift: in-orbit satellite servicing and refueling.
Refueling in Space: The Cleaner, Smarter Alternative
Instead of letting satellites burn up after a few years, companies like Arkisys, Orbit Fab, and Northrop Grumman are developing systems to repair, refuel, and even upgrade satellites in orbit. These initiatives could dramatically extend the life of satellites, reduce the number of launches needed, and cut down on re-entries that contribute to atmospheric pollution.
In-orbit servicing could also help address the growing issue of space debris by keeping satellites functional longer and preventing collisions caused by defunct spacecraft.
Environmental and Economic Upside
Servicing satellites in space isn’t just good for the planet — it also makes financial sense. Operators can avoid the cost of launching replacements, while satellite lifespans could stretch far beyond current norms. More importantly, reducing satellite burn-ups means fewer heavy metals entering Earth’s upper atmosphere — a win for both business and the environment.
What’s Holding It Back?
Despite its promise, in-orbit servicing faces several challenges: high upfront costs, lack of standardized satellite interfaces, regulatory hurdles, and uncertain market adoption. But as demand for space access grows, momentum behind sustainable orbital practices is building fast.
The Future of Space Sustainability
The idea is simple: satellites shouldn’t be disposable. By embracing refueling and repair in orbit, we can minimize the environmental footprint of our expanding presence in space.
As we look skyward, it’s time to bring sustainable thinking into Earth’s orbit. In-orbit servicing could be the innovation that helps space exploration grow — responsibly.
