"Know your enemy and know yourself, and you can fight a hundred battles without disaster" Sun Tzu, The Art of War. Space presents engineers with a perpetual and demanding challenge: its extreme and erratic environments cause conventional Earth-tested technologies to fail. This paper surveys the extreme conditions to which space hardware is exposed from thermal cycling and radiation to vacuum-induced outgassing and abrasive planetary dust and reviews the engineering solutions developed to mitigate them. These solutions include advanced materials and coatings, fault-prediction systems, and design strategies drawn from materials science, mechanical engineering, electronics, robotics, and habitat design. The paper then links each category of problem to its corresponding category of solution, with the aim of establishing a clear, evidence-based picture of what is required for mechanical systems to function reliably in space.