The history of space travel Rockets are the only engines that can operate in the near emptiness of outer space. This is why rockets can be used to propel spacecraft from the earth to the moon, from the planets to the stars. The modern rocket can travel faster than any vehicle. When you think of a rocket, you are most likely thinking of the bullet shaped space ship that goes soaring through space. But, a rocket is, in fact, the name for the engine.
Rockets can supply the power to anything that needs to be propelled.
It can launch a space craft, and automobile, a missile, or even a boat. The simplest explanation of a rocket would be a tube of fuel closed at one end and open at the other. When the fuel burns it is turned into a gas. The hot gas expands and then pushes outward in all directions. In the rocket.