Satellite constellations could create spiraling space debris

• A new analysis suggests that satellite constellations can generate unstable debris when they grow large enough. Hugh Lewis of the University of Birmingham found that constellations can reach a critical size where they create runaway debris. The study analyzed 16 constellations, including some in planning stages and others already in orbit. Six of these exceeded the threshold for unstable debris.
• The findings highlight the growing risk of satellite collisions and debris in Earth's orbit. With over 30,000 satellites already in orbit, and plans for well over a million more, the risk of debris accumulation increases. The analysis shows that even small constellations can lead to instability if their orbits are not carefully managed.
• Lewis’s model predicts that with modest design changes, such as boosting drag or extending satellite lifetimes, many of these problems could be avoided. This offers a practical way for regulators to identify risky proposals before launch. The study emphasizes the need for stricter regulations on satellite deployment to prevent the accumulation of debris that could threaten critical satellite operations.

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