The Junkyard Above
Imagine a highway with millions of stray nuts, bolts, and defunct cars hurtling around at over 28,000 kilometres per hour. That’s the reality in Low Earth Orbit (LEO), where decades of space activity have left a dangerous legacy. This space junk ranges
from dead satellites and spent rocket stages to tiny paint flecks. While small, these objects carry immense kinetic energy; a fragment the size of a marble can hit with the force of a bowling ball, capable of crippling or destroying a multi-crore satellite. Global tracking networks monitor over 43,000 objects larger than 10 centimetres, but there are an estimated 1.2 million untraceable fragments that pose a constant, invisible threat. For a space-faring nation like India, protecting its orbital assets isn't just a technical challenge—it's a national priority.
India's Eyes in the Sky
India's fleet of Earth-observation (EO) satellites is a cornerstone of its national infrastructure. These satellites, part of the long-running Indian Remote Sensing (IRS) satellite system, provide crucial data for everything from agriculture and water resource management to disaster response and national security. They help predict cyclones, monitor forest cover, plan urban development, and provide our armed forces with vital imagery. Losing even one of these satellites to a debris collision could have significant consequences, disrupting essential services and compromising strategic capabilities. In 2025 alone, the Indian Space Research Organisation (ISRO) had to perform 20 collision avoidance manoeuvres to safeguard its satellites, highlighting the escalating risk. This makes developing a robust defense system absolutely essential.
The AI-Powered Guardian System
The headline's "AI thruster" is best understood not as a single device, but as a sophisticated, intelligent system. This system combines two key innovations pioneered by Indian startups: advanced Space Situational Awareness (SSA) and next-generation propulsion. Bengaluru-based startup Digantara is developing AI-powered software and a constellation of satellites to create a high-fidelity map of space debris, tracking objects and predicting potential collisions with incredible accuracy. This AI acts as the 'brain', processing vast amounts of data to identify threats in real-time. This information is then used to command the 'muscle': highly efficient electric propulsion systems, like those developed by another Indian startup, Bellatrix Aerospace. These thrusters can precisely manoeuvre a satellite out of harm's way using minimal fuel, extending its operational life.
A New Era of Autonomous Protection
Traditionally, avoiding a space collision is a manual, ground-based effort. Engineers receive a warning, analyze the risk, and send commands to the satellite to move. This process can be slow and is not always feasible for unexpected threats. The new approach automates this entire sequence. AI algorithms can evaluate risks and trigger avoidance manoeuvres autonomously, without waiting for instructions from Earth. This is a game-changer, providing near-instantaneous protection. ISRO is actively working towards this future, with initiatives like the Space Docking Experiment (SpaDeX) testing the very autonomous technologies needed for automated debris avoidance. This domestic capability reduces reliance on foreign tracking data and positions India as a leader in creating smarter, self-sufficient satellites.
Leading the Way in Space Sustainability
This technological leap is part of a larger national strategy. In 2024, India announced its 'Debris-Free Space Missions' (DFSM) initiative, aiming for zero debris generation from all Indian space activities by 2030. This ambitious goal involves not just avoiding collisions but also ensuring that old satellites and rocket stages are safely de-orbited at the end of their lives. By fostering a vibrant ecosystem of startups like Digantara and Bellatrix Aerospace, and through international collaborations, India is building the tools to make this vision a reality. These efforts are about more than just protecting satellites; they are about ensuring that space remains a safe and usable domain for future generations.
