system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are space rockets steered? I don't see any fins or flaps like on a plane

Do the engines move to direct the rocket? What's to keep them from getting off course?
gpt
During launch, the engine nozzles do indeed swivel a bit to help steer-- this is called gimballing.

In space, very small thrusters pointing different directions are used to control the orientation of the spacecraft so that engine burns are made in the right direction. There is also a technique called spin-stabiliziaton, where spinning a spacecraft rapidly will keep it stable along the spin axis.