penetrator probeA device that, by impact, tunneling, or melting, penetrates beneath the surface of a planet, moon, asteroid, or comet, to investigate the subsurface environment. Among missions currently under development or consideration that will deploy penetrator probes are Deep Impact and the Europa Ocean Explorer (see Europa, future probes). The failed Mars Polar Lander carried the first penetrator probes. Related category TYPES OF SPACECRAFTAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |