Follows a simulation of what it might be like to be an astronaut on Mars, with celebrity contestants competing to be the last one standing, the "celebronaut."Follows a simulation of what it might be like to be an astronaut on Mars, with celebrity contestants competing to be the last one standing, the "celebronaut."Follows a simulation of what it might be like to be an astronaut on Mars, with celebrity contestants competing to be the last one standing, the "celebronaut."