2 articles
Post-mission disposal
Post-mission disposal (PMD) is the set of end-of-life actions that move spent spacecraft and rocket stages to reentry, graveyard orbits, or Earth escape, with rules like the FCC's 5-year deorbit requirement.
Space sustainability
Space sustainability is the practice of keeping Earth's orbital environment usable for current and future missions by limiting debris, disposing of spacecraft, and coordinating traffic.