Attitude control was achieved by several small cold gas thrusters.

Actuators were three momentum wheels, and hot gas (hydrazine mono-propellant) thrusters.

Kiley's photon amps quartered a square metre of the rock's surface a millimetre at a time, then it fired its cold gas thrusters and moved to the next section.

Experimental gas thrusters (build time 8 hours) and automotive brackets have been manufactured in Ti-Grade 5.

Then he shoved himself through, orienting to align the gas thruster on his backpack.

A cold gas thruster is a rocket engine/thruster that uses a (typically inert) gas as the reaction mass.

A cold gas thruster usually consists of simply a pressurized tank containing gas, a valve to control its release and a nozzle, and plumbing connecting them.

The reaction and control system is based on cold gas thrusters.

The HST can't use rocket engines or gas thrusters to steer like most satellites do, because the exhaust gases would hover near the telescope and cloud the surrounding field of view.

Performance of electrothermal systems in terms of specific impulse (Isp) is somewhat modest (500 to 1000 seconds), but exceeds that of cold gas thrusters, monopropellant rockets, and even most bipropellant rockets.