What is the fuel used in modern rockets?

[SilasLee]

Rockets are jet propulsion devices that move forward by expelling high-speed hot gas streams backward, utilizing the generated reaction force. They carry their own fuel and oxidizer, not relying on atmospheric oxygen for combustion, enabling operation both within the atmosphere and in outer space. During flight, rockets become variable-mass vehicles as their propellants are consumed. Relevant information about rockets is as follows: Introduction 1: Modern rockets serve as rapid long-distance transport tools, such as sounding rockets, launch vehicles for artificial satellites, manned spacecraft, space stations, and boosters for other aircraft. Introduction 2: When equipped with warheads for combat delivery, they form rocket weapons. Guided versions are called missiles, while unguided ones are termed rocket projectiles. Common liquid oxidizers include liquid oxygen and nitrogen tetroxide, with fuels comprising liquid hydrogen, unsymmetrical dimethylhydrazine, and kerosene.