How much does space debris threaten satellites?

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1. 1

   Space debris (Wikipedia)

   WikipediaPublished Oct 3, 2026Checked Oct 4, 2026

   “Space debris (also known as space junk, space pollution, space waste, space trash, space garbage, or cosmic debris) are defunct human-made objects in space – principally in Earth orbit – which no longer serve a useful function. These include derelict spacecraft (nonfunctional spacecraft and abandoned launch vehicle stages), mission-related debris, and fragmentation debris from the breakup of derelict rocket bodies and spacecraft. In addition to derelict human-made objects left in orbit, space debris includes fragments from disintegration, erosion, or collisions; solidified liquids expelled from spacecraft; unburned particles from solid rocket motors; and even paint flecks. Space debris represents a risk to spacecraft. Space debris is typically a negative externality. It creates an external cost on others from the initial action to launch or use a spacecraft in near-Earth orbit, a cost that is typically not taken into account nor fully accounted for by the launcher or payload owner. Several spacecraft, both crewed and un-crewed, have been damaged or destroyed by space debris.”

2. 2

   Who Cares for Space Debris? Conflicting Logics of Security and Sustainability in Space Situational Awareness Practices.

   Science and engineering ethics (Klimburg-Witjes et al.)Published Sep 24, 2025Checked Oct 4, 2026

   “This article offers a novel perspective on the security legacies and infrastructures of space debris mitigation and how these affect current and future space debris detection, knowledge production, and mitigation practices. Acknowledging that space debris is not just a technical challenge, but an ethico-political problem, we develop a transdisciplinary approach that links social science to aerospace engineering and practical insights and experiences from the European Space Agency´ (ESA) Space Debris Office. Specifically, we examine the role of secrecy and (mis)trust between international space agencies and how these complicate space situational awareness practices. Attending to the "mundane" practices of how space debris experts cope with uncertainty and security logics offers a crucial starting point to developing an ethical approach that prioritizes care and responsibility for innovation over ever more technological fixes to socio-political problems. Space debris encapsulates our historical and cultural value constellations, prompting us to reflect on sustainability and responsibility for Earth-Space systems in the future.”

3. 3

   AI-driven collision risk prediction and debris optimization in low earth orbit.

   Scientific reports (Alkhazraji et al.)Published Sep 3, 2026Checked Oct 4, 2026

   “Then, an AI surrogate model, viz., gradient-boosted decision trees, was trained to predict collision conjunction relative probabilities and risk. Thereafter, data analysis and explain ability techniques are utilized to uncover underlying risk drivers and reveal how altitude, inclination, mass loading, and crowding interact across the orbital space. The analyses showed how the AI surrogate model reliably captures underlying nonlinear risk behavior and interactions. More importantly, it suggested that meaningful capacity increases are achievable with only a moderate rise in predicted risk. Finally, the AI surrogate model was employed in a multi-objective evolutionary optimization to quantify the trade off between minimizing collision risk and maximizing usable orbital capacity, revealing a set of optimal, feasible, and well-balanced points of operation in this regime. Ultimately, the proposed pipeline offers a computationally efficient pathway for prediction and interpreting orbital safety, guiding constellation deployment, and supporting sustainable space traffic management strategies.”

4. 4

   Space Debris In-Orbit Detection with Commercial Automotive LiDAR Sensors.

   Sensors (Basel, Switzerland) (Lopez-Calle)Published Nov 14, 2024Checked Oct 4, 2026

   “This article presents an alternative approach to detecting and mapping space debris in low Earth orbit by utilizing commercially available automotive LiDAR sensors mounted on CubeSats. The main objective is to leverage the compact size, low weight, and minimal power consumption of these sensors to create a "Large Cosmic LiDAR" (LCL) system. This LCL system would operate similarly to a giant radar circling the Earth, with strategically positioned LiDAR sensors along the target orbit. The article examines the feasibility of this concept by analyzing the relative orbital velocity between the sensor and debris objects, and calculating the time required to scan a complete orbit.”

5. 5

   Securing space domain awareness overview: decisions in the nick of time.

   NPJ wireless technology (Benchoubane & Karabulut)Published Apr 2, 2026Checked Oct 4, 2026

   “Space domain awareness (SDA) has evolved in parallel with the growing recognition of space as a domain. It has not developed in isolation; the inexorable presence of cyberspace and electromagnetic spectrum domains further complexifies it. SDA is not only about improving global awareness of space itself; it ultimately guides all decision-making made in it. This review traces the evolution and characteristics of the space domain, the architecture and operational principles of SDA, and the interplay with cyber and spectrum capabilities. It focuses on securing the end-to-end decision chain and highlights how architectural choices, scaling, and integration between physical and non-physical domains influence the resilience of SDA. Emphasis is also placed on forward-looking initiatives, both technical and non technical, that aim to safeguard data, operations and their timing; the linchpin of SDA.”