space debris mitigation

Syllable breakdown

Dictionary meaning

the set of engineering practices, operational protocols, and international guidelines designed to limit the creation of new orbital debris and reduce the long-term growth of the space debris environment, which already contains hundreds of millions of fragments ranging from intact defunct satellites to paint flecks travelling at orbital velocities above seven kilometres per second; at these speeds even centimetre-scale debris can cause catastrophic damage to operational spacecraft; mitigation practices include passivating rocket stages after use by venting residual propellants, designing spacecraft to re-enter and burn up within twenty-five years of end of mission, avoiding destructive anti-satellite weapons tests, and implementing collision avoidance manoeuvres based on conjunction analysis; without effective mitigation the risk of a chain-reaction Kessler syndrome event could eventually render certain orbital shells unusable