Environment and Sustainability in Space

Space debris refers to all non-functional artificial objects in Earth's orbit, such as spent rocket stages, defunct satellites, or collision fragments. They pose a major risk to operational satellites and crewed missions due to their extreme speed. Their accumulation threatens the long-term sustainability of Earth's orbit.

Responsible strategies include controlled deorbiting (bringing the satellite back into the atmosphere for burn-up) or moving it to a less congested "graveyard orbit." Modular design to facilitate in-orbit repair and refueling is also a promising avenue for reducing waste.

Yes, launches consume significant amounts of fuel, emitting CO₂ and other particulates into the atmosphere. The industry is working on cleaner fuels (such as liquid methane), launch vehicle reuse, and trajectory optimization to minimize this impact.

Several guidelines exist, such as those from the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS). They encourage debris mitigation, transparency, and cooperation. However, their enforcement is not always binding, which drives the development of stricter technical standards and national frameworks.

Sustainable design incorporates less polluting materials, an architecture facilitating in-orbit maintenance, reliable end-of-life maneuver propulsion systems, and eco-designed electronics. The goal is to increase longevity and ensure safe disposal.