Find:

а) синонимы

spacecraft, to call, artificial, significance, area, man-made, satellite, purpose, complicated, importance, space vehicle, explorer, aim, to guide, to offer, researcher, investigation, to incorporate, sophisticated, to propose, to determine, exploration, to define, to gather, to control, to collect, to name, to include, district, moon;

б) антонимы

special, upper, unmanned, natural, last, manned, unequal, conventional, distant, first, lower, civil, equal, inefficient, military, near, efficient, artificial.​