Jupiter's intense atmospheric pressure and high temperatures would prevent human habitation throughout the planet. These conditions would crush and melt humans and man-made technology. Chemically, the planet's atmospheric makeup of hydrogen and helium is similar to that of the sun. Jupiter has no solid surfaces and experiences extreme weather, illustrated by the 300-year-old Great Red Spot, a storm that has been raging on the planet for centuries.
Although in the lower parts of Jupiter's atmosphere the surface temperature and pressure is similar to that on Earth, the layer exists between outer atmosphere temperatures of lower than minus 260 degrees Fahrenheit and inner oceans of over 15,000 degrees Fahrenheit. Jupiter's strong magnetic field risks damaging nearby spacecraft, making human exploration both difficult and risky. In 1995, when NASA released a space probe into Jupiter's atmosphere, the probe traveled about 100 miles into Jupiter's atmosphere over 57 minutes before the pressure crushed it and the heat vaporized it. Although scientists doubt the possibility of life ever existing on Jupiter, they believe that its moon Europa, which contains liquid water beneath its frozen surface, may be suitable for both indigenous life and human habitation. Other moons of Jupiter may also be suitable for human life.