The infrastructure of modern life is increasingly anchored in the vacuum of low-Earth orbit. From the navigation apps that guide daily commutes to the climate sensors monitoring global shifts, satellites have become the invisible scaffolding for nearly every digital interaction. However, this utility has led to a population boom: there are now more than 10,000 operational satellites circling the planet, a figure that continues to rise as commercial launch costs plummet.
This density brings a mounting physical risk. Alongside active hardware, orbit is cluttered with 5,000 decommissioned satellites and an estimated 100 million pieces of debris, ranging from spent rocket stages to minute flecks of spacecraft paint. For Richard Linares, an associate professor at MIT’s Department of Aeronautics and Astronautics, the situation has moved past a mere logistical annoyance toward a fundamental question of sustainability. He suggests that we are approaching a definitive "orbital capacity"—a threshold where additional hardware may compromise the very services we depend on.
Linares, who leads MIT’s Astrodynamics, Space Robotics, and Controls Lab (ARCLab), argues that managing this congestion is primarily an engineering challenge. While the decision to launch is often driven by market demand or national interest, the physical reality of space requires a more systematic approach to traffic management. The goal of his research is to quantify the trade-offs, determining the point at which the societal value of a new constellation is outweighed by the risk it poses to the long-term viability of the orbital commons.
With reporting from MIT News.
Source · MIT News
