The idea of a human traveling to all the planets in the Solar System is exciting. However, apart from Earth, no other planet offers conditions that allow human survival without special equipment. If a person suddenly appeared on the surface of every planet without a spacesuit, his survival time would be extremely limited. But let's see how long a person would survive, without equipment, on each planet.
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Earth
Earth is the only known planet that naturally supports human life. With proper access to food, water, and shelter, a human can live their entire natural lifespan. The average lifespan on Earth is 80 years.
Hermes
Mercury has no substantial atmosphere. The temperature ranges from about -180°C at night to 430°C during the day. Without an atmosphere, the body would be exposed to the vacuum of space. A person would lose consciousness within seconds due to lack of oxygen. Survival time is 1 to 2 minutes.
Aphrodite
Venus is considered the most inhospitable planet for humans. The surface temperature reaches about 465°C, while the atmospheric pressure is about 92 times that of Earth. A person would be crushed by the pressure and would burn almost instantly. The survival time is less than one to a few seconds.
See also: “Electrical hell” on Jupiter: Lightning of unimaginable power
Mars
Mars is the most human-friendly planet after Earth. However, its atmosphere is mostly carbon dioxide and is very thin. Without protection, a person would quickly lose consciousness from suffocation and low pressure. Survival time is 1 to 2 minutes.
Jupiter
Jupiter is a giant gas planet with no solid surface. A person would fall into the dense layers of gases, where the pressure and temperature are constantly increasing. Before reaching deep inside, they would die from lack of oxygen and extreme conditions. The survival time is less than 1 minute.
Saturn
Saturn is also a gas giant. It has similar conditions to Jupiter, although the gravity in the upper atmosphere is somewhat milder. The lack of oxygen and the increasing pressure would be fatal. Survival time is less than 1 minute.
Heaven
Uranus is an ice giant with temperatures that can drop below -220°C. It has no solid surface and its atmosphere contains hydrogen, helium, and methane. Its survival time is less than 1 minute.
See also: In this planetary system everything is upside down!
Poseidon
Neptune is characterized by extremely strong winds, extreme cold, and enormous pressures in the deepest layers of its atmosphere. Like the other gas giants, there is no surface on which a person could stand. Survival time is less than 1 minute.
