摘要
Dear authors and readers,Since the beginning of the space age,the return of samples from the other celestial bodies has been deemed one of the ultimate forms of unmanned robotic missions.Realizing a sample return mission requires profound knowledge of many wide and different areas of engineering and science.In a special way,astrodynamics plays a crucial role throughout the mission,ranging from accurate guidance and navigation to distant bodies,to precise modeling of dynamical environment of target bodies,precision landing to an aimed point,various surface and proximity activities around the bodies,and orbit design for the round-trip journey.
