Unmanned probe approaching Pluto. Probe is powered by thermionic radioisotope power generator. The laser beams for surface illumination, with optical sensors slaved to the beams. Other equipment comprises radiation counters as well as field, plasma and particle sensors.
Prime goal of Project Viking is this National Aeronautics and Space Administration sketch, to land a biological laboratory on the surface of Mars. The picture shows a design in which the protective housing around the experiments unfolds in petal fashion once the laboratory is safely on the Martian surface.