Jupiter is a gas giant, which means it doesn't have a solid surface and the gas it's formed of is harmful to humans. It is also quite distant from the sun (it might take over an hour for sunlight to reach there), which means it is exceedingly chilly. However, because of its size, Jupiter has very strong winds that transport heat around its atmosphere, which could potentially allow for life in some form or another.
In fact, there are two reasons why this question has been asked before: 1 There are other planets in our solar system that can support life; 2 Even if there isn't any life now, it doesn't mean it couldn't have evolved later. Scientists think that maybe even Jupiter itself once had life inside it, even though it is certainly too cold for that today.
Of course, you wouldn't want to live there. The air on Jupiter is made up mostly of hydrogen sulfide (which is toxic for humans) with some oxygen atoms attached to those molecules. The only place where there is no hydrogen sulfide is at the top of the atmosphere, where there is light air containing some water vapor and carbon dioxide.
Even so, living on Jupiter would be different from living on Earth because all the gravity there is 100 times stronger than on Earth! This would make things difficult not just for humans but for anything else as well.
Jupiter is a turbulent planet with fierce storms and no solid surface. It has a surface temperature of -110 degrees Celsius, but its lower atmosphere is incredibly hot! If there was life here, it would have to exist in the higher atmosphere. It would burn up if it dwelt in the lower atmosphere. Life as we know it requires water and carbon based molecules. Both of these are scarce in Jupiter.
The chemistry of Jupiter's atmosphere is very different from that of Earth's. Here on Earth, oxygen molecules are the most common gas in the air. But on Jupiter, hydrogen is more abundant. Oxygen molecules can be formed from hydrogen molecules in the atmosphere of Jupiter but they quickly disappear again. So overall, the atmosphere of Jupiter is made up mostly of hydrogen and helium. Some scientists have suggested that there could be other gases present in smaller amounts, including nitrogen, methane, ammonia, and even water vapor. The presence of methane in Jupiter's atmosphere suggests that there may be underground reservoirs of this molecule where it can accumulate.
Earth's biggest neighbor does not look like something you would want to live on. Its large size creates severe weather patterns which destroy any hope of finding stable regions anywhere on the planet.
However, there is some evidence to suggest that deep inside Jupiter's clouds exists a layer of super-heated liquid metal that flows continuously from the core out to the planets' outer edge where it is recycled back into the center.
The atmosphere of Jupiter is largely made up of hydrogen and helium gas. It would be a horrible idea to try to land on Jupiter. You'd be subjected to incredibly high temperatures and would be stranded in mid-Jupiter with no possibility of escaping. The only way to reach Earth from Jupiter is by means of a spacecraft.
Even if a human were able to make it through the initial shock of landing on Jupiter, they would still be crushed under its weight. The average density of Jupiter is 110 times that of water; meaning that anyone who landed on its surface would be compressed into a thin layer of jelly.
However, because Jupiter has such strong gravitational pull, any object smaller than about 10 miles (16 km) across would be torn apart before reaching its surface. So if you were flying through space and spotted something small enough to destroy with a single blow, then you could probably assume that it was a planet and not a star or galaxy.
In fact, asteroids are often destroyed by collisions with other asteroids of comparable size. There's actually a limit to how big an asteroid can get before it collapses under its own weight. The largest known body in our solar system is Jupiter itself. With a diameter of 569 miles (924 km), it is more than twice as big as all the other planets combined.
Asteroids are very common in the universe.
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