How does a rocket go into space and back down to earth

Rockets go into space by the use of engines. They arrive back to earth also by engines however, after they arrive past the layers of the earth (stratosphere, troposphere etc), they use a parachute to slow down the speed of the engine.

Earthplanet yplanet y5=earth     *many different equationsplanet x1.5=earthplanet x is two times planet yobject 5,2500 mass5,1,3,2,4object 1 is four times obect 4