Here space craft is moving with constant velocity
Now due to gas leakage it will have acceleration perpendicular to velocity
it is given that acceleration is always perpendicular to velocity
So it will neither increase nor decrease the velocity
it will only change the direction of the motion
so it is the centripetal acceleration of the space craft
in this case we will say that path of the space craft will be circular path
So it will perform Uniform Circular Motion and its path will be a circle