จรวด

Also known as rockets

alt=|thumb|upright|A Soyuz-FG rocket launches from "[[Gagarin's Start" (Site 1/5), Baikonur Cosmodrome ]] A rocket (from , and so named for its shape) is an elongated flying vehicle that uses a rocket engine to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Unlike jet engines, rockets are fuelled entirely by propellant which they carry, without the need for oxygen from air; consequently a rocket can fly in the vacuum of space, indeed rocket engines operate more efficiently outside the atmosphere.