Beyond meeting the 25-year deorbit target, what specific engineering consideration must engineers prioritize for spent stages that cannot be actively removed?

Answer

Designing for passive thermal stability

Engineers must prioritize designing components like fuel tanks to vent safely or break apart upon reentry, preventing in-orbit explosions, which is known as designing for demise.

Beyond meeting the 25-year deorbit target, what specific engineering consideration must engineers prioritize for spent stages that cannot be actively removed?
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