Rocket motors are devices that produce thrust to propel rockets into space. They work by expelling gas at high speed in the opposite direction, following Newton's third law of motion. Rocket motors can be powered by solid or liquid propellants, each with its own advantages and disadvantages. Solid rocket motors contain fuel and oxidizer in a solid form, while liquid rocket motors store these components separately and mix them during combustion. Both types are essential for launching spacecraft, satellites, and even crewed missions, contributing to advancements in space exploration and technology, such as those seen in NASA and SpaceX.