SpacecraftExtraterrestrial EnvironmentJupiterSpace FlightEcological Systems, ClosedMarsUnited States National Aeronautics and Space AdministrationCosmic DustSaturnMeteoroidsSpace SimulationMoonEnvironment, ControlledIceSolar SystemCosmic RadiationAtmosphereEnvironmental MicrobiologyWeightlessnessVolcanic EruptionsAstronautsBacillusSpores, BacterialMicrococcusFungiGravitationCorynebacteriumActinomycetalesBacteria