It is a tiny helicopter developed by NASA.
It flew over the Martian surface for fourty seconds,.
It was the first ever powered flight on any other planet
It uses jet propulsion.
It is an aircraft which uses onboard propulsion with mechanical power generated by an aircraft engine of some kind.
Aircraft propulsion generally always uses either a type of propeller, or a form of jet propulsion.
It is an application of Newton’s thirds law of motion i.e. for every action there is an equal and opposite reaction.
In this, the atmospheric air is made to accelerate as it passes through the engine.
The force which provides this acceleration has an equal effect in the opposite direction acting on the apparatus which produces the acceleration.
In jet propulsion engines/ propellers propel the aircraft by thrusting a large weight of air backwards.
In the form of a large air slipstream at comparatively low speed.
The other in the form of a jet of gas at very high speed.