Duties of the rocket is a rocket Bringing satellite or other spacecraft into space. You must have a very high-powered rocket. To overcome the force of gravity are two types of rockets.
Solid fuel rocket There are no complex structure But when combustion occurs. Can not be stopped
Liquid rocket fuel A complex structure It must have tanks to store liquid fuels. And liquid oxygen (To allow for combustion), which is below the freezing point. It must have pipes and pumps to transport fuel into the engine to burn. The advantage is that liquid fuel rocket You can control the amount of combustion And adjust the direction of gas flow.