LOS ANGELES, July 7 — Thousands of satellites are now returning to Earth in a controlled burn, and for communities across Asia watching the night sky, the question is no longer whether space debris falls — but what exactly falls with it. SpaceX’s Starlink constellation, the largest satellite network ever built, uses a process where onboard thrusters lower each satellite’s orbit until it reenters the atmosphere at high speed.
The company designs these satellites to burn up completely between 50 and 80 kilometers above the ground, a stage engineers call “demise.” The method is meant to prevent debris from lingering in orbit. Each satellite weighs about 2,700 pounds.
Most of that mass is aluminum and other metals. When these objects hit the atmosphere at orbital velocity, the materials vaporize, leaving behind a trail of metallic particles high in the sky.
Regulatory oversight and a growing number of reentries
The U.S. Federal Aviation Administration and the Federal Communications Commission oversee the licensing of satellite reentries. In the six months ending September 2024, SpaceX deorbited 260 satellites. That pace could increase as the Starlink network expands further.
The company claims a 100% demise rate for its satellites — meaning every piece is supposed to burn up before reaching the ground. But independent studies have questioned whether all components fully disintegrate.
Some parts, made of tougher materials, may survive the heat of reentry. The process itself is similar to what other satellite operators use. What sets Starlink apart is the sheer number of satellites involved.
SpaceX now runs the largest fleet in orbit, making it the biggest single contributor to atmospheric reentry events worldwide.
What this means for the region
For families across Asia, where Starlink service has expanded rapidly in rural and remote areas, the growing number of reentries raises practical questions. The metallic particles left behind in the upper atmosphere are a new kind of pollution — one scientists are still studying. Aluminum vapor, for instance, can interact with the ozone layer in ways researchers are only beginning to understand.
Closer to home, communities in the Philippines, Indonesia, and other parts of Southeast Asia have reported seeing bright streaks across the sky that some initially mistook for meteors. These are often satellite reentries, happening with increasing frequency as the constellation ages and replacements are launched.
SpaceX has not disclosed exactly how many of its thousands of operational satellites are nearing the end of their designed lifespan. But with 260 deorbited in just six months, and the constellation continuing to grow, the number of reentries is expected to climb. The FAA and FCC continue to license each reentry event.
Independent researchers have called for more transparency about what materials survive the burn and where any surviving fragments might land. For now, the official position remains that Starlink satellites burn up completely — a claim that not all scientists accept.
What happens next depends on how fast the constellation expands and how many older satellites need to be replaced. For communities across the region, the sky above is becoming busier than ever — not just with signals, but with falling metal.
Sources
- Elon Musk’s Starlink fleet is burning up in orbit, scientists say
- SpaceX Satellites 2026: Starlink, Largest Fleet in Orbit
