-- See Also the narrower term Ballistic missiles Here are entered works on high-altitude, high-speed atomic missiles which are self-propelled and guided in the first stage of flight only, after which the trajectory becomes natural and uncontrolled. Works on conventional missiles are entered under Projectiles. Works on powered and guided missiles are entered under Rockets (Ordnance) and Guided missiles.
-- See Also Interplanetary voyages Here are entered general works and imaginary accounts on travel to the planets. Works on the physics and technical details of flight beyond the earth's atmosphere are entered under Space flight.