spacecraft, propulsion, propellant, nitrogen tetroxide, drogue parachute, ramjet, orbiter, retrorockets, actuator, propulsion system, hydraulic pump, nozzle, gyroscopes, drogue, toru, orbital velocity, combustor, cryostat, ablator, hypervelocity, ballistic trajectory, hydraulic ram, rotor, ramjet engine, geosynchronous, inertial guidance, piston rod, particle beam, monopropellant, lander, orbital, sensor, inertial navigation, airfoils, photometer, deflector, cosmic ray, payload, hydraulics, solenoid, propellent, vaporisation, drogue chute, overpressure, aerofoil, steam boiler, compensator, ionisation, venturi, oxidizer, combustion chamber, linac, nosecone, heat shield, spacesuits, aerodynamic, interferometer, tokamak, rudder, spacewalk, intake valve, sideslip, oxidiser, pintle, condenser, jackscrew, exhaust valve, solid rocket, gimbal, radiosonde, launch vehicle, rotor shaft, ailerons, fuze, vernier, hydrodynamic, microswitch, airglow, radome, reverser, hydrazine, perilune, magneto, actuation, afterburner, compressor, valve, usos, airlock, dewar, sonde, heat exchanger, bilge pump, impeller, booster rocket, transonic, parahydrogen, geosynchronous orbit, retroreflector, turbofan engine, soyuz, camshaft, thrusters, engine, piston, propeller, burner, contactor, axle, boiler, cleat, coil, collimator, compressors, dipole, loudspeaker, rail, rudders

interloper, intruder, trespasser

pusher