摘要: In this paper the morphological and kinematical properties of jets collimated “optical” flows from young stellar objects are reviewed. Numerous recently obtained high-quality CCD images shown to illustrate these their associated bow-shock like structures. The currently available data on jet sources also addition a few other topics (e.g. jet’s working surface radiative bow shocks) kinematic driving gas molecular low-mass stars discussed. It is suggested that it consists mainly neutral, atomic with velocities in order 50 km/s.