Vacuum is a ruthless designer, and it hates pretty starships. Beyond an atmosphere, speed belongs to whatever machine can push the hardest for the longest, not whatever looks agile to a pilot’s eye or to a movie camera.
Outrun fantasy fighters? A blocky craft does, because the governing law is the Tsiolkovsky rocket equation, which rewards propellant mass fraction and exhaust velocity, not wings or knife‑edge fuselages. Lift vanishes when there is no fluid to push against; only thrust and specific impulse matter. So engineers stack propellant tanks, engines, power systems, and reaction‑control thrusters into dense clusters, then bolt on trusses and attitude control wheels, accepting awkward silhouettes in exchange for delta‑v that a winged vehicle could never carry.
Drag‑free flight sounds romantic; it is actually unforgiving, and that pushes designs toward engine‑dominated bricks. With no atmospheric heating to help shed waste energy, large thermal radiators sprawl like metal leaves, sized by the Stefan–Boltzmann law instead of by any aesthetic. High‑efficiency ion drives and nuclear‑electric propulsion demand bulky power conversion hardware, shielding, and heat pipes, so the “ship” becomes mostly machinery with a small pressurized capsule hiding inside. The result hardly flies at all in the cinematic sense, yet in the only medium that counts for interplanetary travel, that airless, indifferent void, it simply keeps burning and walks away from every winged myth.