The other planets of the Solar System are far from welcoming places for human life
Planet Earth is the only hospitable place for human life within millions of kilometers. This is confirmed by a short film that the astrophysicist Neil de Grasse Tyson published on Business Insider. The main theme of the video is: how much could we survive on the planets of the Solar System without space suit? Of course, even the same journey to other celestial bodies, without sufficient protection, would be mortal for man. Thirty seconds require the blood to deplete oxygen, preventing the proper functioning of the brain. Freezing would be a much longer process since the absence of air would make heat transfer very slow. In short, death would come from asphyxiation, or lack of oxygen. But what would happen to the other planets in the Solar System?
Mercury is the planet closest to the Sun, so the face turned towards the star reaches infernal temperatures. The area beyond the terminator, or wrapped in the night, becomes glacial. In short, to survive you should place in the middle between these two areas. Without space suit we would live the time needed to hold our breath: two minutes. The conditions of Venus are even worse. The planet is enveloped in a thick layer of poisonous gas, capable of generating a powerful greenhouse effect. The surface temperatures reach 480 degrees while the gravitational attraction similar to our planet would make it possible to walk on it, before being burned alive, in a second. On Mars average temperatures reach 55 degrees below zero, so in a hypothetical journey on the Red Planet we should wear heavy clothes, but the lack of air would kill us in two minutes. On Jupiter and Saturn the absence of a solid surface on which to walk would plunge us towards the center of the planet, before being crushed by atmospheric pressure in a second. On the two ice giants Uranus and Neptune death would occur in a second, even in this case due to the extreme pressure of the gases.