CAPE CANAVERAL, July 7 — 351 metric tons. That is the total mass of Starlink hardware that SpaceX has deliberately burned up in Earth’s atmosphere over a six-month window. The figure that matters: 260 satellites, each weighing roughly 2,700 pounds, deorbited between December 2023 and May 2024.
The bottom line: SpaceX’s standard procedure to retire older satellites and replace them with newer models is raising environmental questions that regulators have not yet answered. The company, founded by Elon Musk, began launching the Starlink constellation in 2019.
It now operates more than 5,500 satellites providing broadband internet globally.
By the numbers
Each satellite that reenters the atmosphere does not simply vanish. Scientists warn that the burn-up releases aluminum oxides and other metallic compounds. A 2023 study from researchers at the University of Southern California estimated that reentering satellites could increase aluminum oxide levels in the mesosphere by up to 650% over natural levels.
Those compounds, researchers argue, could damage the ozone layer and alter atmospheric chemistry. Investors will note that the deliberate deorbiting is not an emergency measure.
It is part of SpaceX’s planned lifecycle management for the constellation. Older satellites are sacrificed to make room for upgraded versions. The 260 satellites deorbited over that six-month period represent a routine turnover, not a failure.
The regulatory picture
The Federal Communications Commission, which licenses satellite operations, is currently considering a proposal that would exempt certain satellite deorbiting activities from environmental review under the National Environmental Policy Act. The FCC initiated this rulemaking in 2023. Environmental groups, astronomers, and industry stakeholders have submitted comments.
No final decision has been announced. Critics argue that such an exemption would bypass necessary scrutiny of cumulative atmospheric impacts.
The concern is not limited to a single deorbiting event. It is the aggregate effect of hundreds of satellites burning up over time, with the Starlink constellation alone numbering over 5,500 operational units and growing.
What to watch next
The FCC’s rulemaking remains open. The agency has not signaled when it will issue a final decision. The broader debate about space debris, orbital sustainability, and the environmental footprint of the satellite internet industry continues to intensify. For now, the 351 metric tons of vaporized hardware sits as a data point that regulators, scientists, and industry players are still working to interpret.
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