Do we still need astronauts?
D018480:Astronauts; D001256:Astronomy / Q000295:instrumentation / Q000639:trends*; D006801:Humans; D012371:Robotics; D013026:Space Flight / Q000295:instrumentation / Q000639:trends*; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000639:trends*