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The multidisciplinary field dedicated to figuring out how to leave the planet without exploding, burning up, suffocating, or any combination of the above. It combines physics (thrust, trajectory), chemistry (fuel that doesn't blow up too soon), biology (keeping humans alive in a metal can), and psychology (keeping those humans from murdering each other in said can). Spaceflight sciences have mastered the art of launching multi-billion-dollar equipment into the void, where it either works perfectly or becomes very expensive space junk. The field's greatest achievement is making the impossible merely extremely difficult.
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