Jupiter has no stable surface, therefore if you try to stand on it, you will sink and be crushed by the immense pressure inside the planet. If you could stand on Jupiter's surface, you would feel strong gravity. Jupiter's surface gravity is 2.5 times that of Earth's.
However, due to the intense heat from within, the surface is likely to be very hot, probably over 1000 degrees Fahrenheit. Even at that temperature, water would still be liquid. But because of the intense pressure, there wouldn't be any oceans under the surface. There might be ice or gas clouds instead.
Without solid ground to stand on, a person would be able to walk by using its large gravitational field as an invisible platform. However, due to the intense pressure, each step would hurt like hell and would require tremendous endurance. After walking for some time, the feet would get very sore and would need recovery time.
The sky above Jupiter is made up of clouds of hydrogen sulfide (H2S). The presence of this compound indicates that the atmosphere contains organic molecules, which are the building blocks of life as we know it. So basically, yes, a person could stand on Jupiter and survive.
The swirly "surface" of Jupiter that we view from Earth is really the ammonia and methane clouds that make up the planet's very top layer. Because the planet is entirely formed of gases, standing on the surface would be impossible, yet there is no surface to stand on. The only place where something might come close to a ground is in the southern hemisphere, where there are several large mountains that rise about 13,000 feet above the churning clouds.
Jupiter has two strong magnetic fields that extend out into space from each pole. These fields protect its atmosphere from solar wind particles and also contain most of the planet's active volcanism.
Jupiter has four major moons: Io, Europa, Ganymede, and Callisto. Of these, only Io orbits closely around the planet; it takes about 12 hours to complete one orbit. The other bodies are considered trojans because they lie outside of Jupiter's main ring but inside of its broader orbital zone. They are trapped between Jupiter and the Sun, orbiting both their primaries once every 9 years or so.
Io is the most volcanic body in the Solar System. It is covered by a thick blanket of gas and dust that blocks out much of the sunlight that reaches it, but more explosive eruptions still occur regularly.
Europa has a thin veneer of ice over a deep liquid ocean.
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 person survived the heat of Jupiter's interior, they would be crushed under its weight. Jupiter is over 1000 times more massive than Earth, so even if you could somehow avoid being killed by the pressure, you would be torn to pieces by its mass.
The best place for humans to live is probably Mars. There are studies that suggest that once Mars was more like Earth with an ocean of water beneath its surface. Today there is evidence that shows that Mars was once connected to Earth through what we now know as a "seafloor" (the space between continents and oceans). This connection may have been due to volcanic activity or even icebergs breaking off from Antarctica. In any case, there is evidence that shows that Mars was once warmer than it is today. Scientists think that this is because there was once more water on the planet which released carbon dioxide into the atmosphere which caused it to cool down.
So humans could live on Mars. But there's no air and very little water.
People also wonder if we can leap from Earth to Jupiter. Because Jupiter lacks a solid surface, one would plunge into its interior. Jupiter's "surface" gravity is around 2.36 times that of the Earth's (Planetary Fact Sheet-Ratio to Earth), therefore walking, much alone jumping, would be difficult.
The answer is no, you cannot jump on Jupiter. Even if you could survive the crash, it would be very dangerous because you would land far away from help or shelter. The best way to view Jupiter is from across open space; there are many satellites orbiting it so it is not necessary to get close up.
Jupiter has 14 moons: Io, Ganymede, Europa, Maia, Metis, Adrastea, Anthe, Athëna, Calypso, Circe, Daphne and Penélope. Of these, four are larger than 5 miles in diameter and three are larger than 10 miles in diameter.
Io is the only moon that orbits entirely within Jupiter's sphere of influence. It experiences intense heat from the radiation and particle winds blowing off the planet. Volcanic activity on Io has created dozens of large volcanoes that emit gas and debris that orbit Jupiter.
Ganymede is the largest moon in the solar system.
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Jupiter is the largest planet in our solar system, with a larger gravitational pull than Earth. This means that if you weigh 40 kilograms (88 pounds) on Earth, you would weigh 94 kilograms (207 pounds) on Jupiter. However, even if you gain weight, your mass remains constant! The reason for this is that Jupiter is so massive that it creates a strong force which prevents any objects from being torn apart.
Earth's moon does not have this protection because it is not as large as Jupiter. If an object has a greater mass than the moon, then its gravity will overpower that of Earth and drag it down to destruction. For example, if a person weighed 100 times more than the moon, then its gravity would be 10 times stronger than Earth's and could destroy us. The closest approach our moon makes to Earth is about 250 million km (155 million miles), so it stays away enough to not cause problems for us.
It is difficult for us to estimate how many planets there are in other solar systems because we can't see them, but scientists assume that there must be at least one other world like Earth because everything else would be destroyed by the gravity of the star it orbits.
Stars like our Sun burn out after trillions of years, but some last much longer. Our Sun will one day collapse into a neutron star or black hole, but if it fails to do so before then it will consume itself.
Despite being much greater in size, Jupiter's surface gravity is just 2.4 times that of the Earth's. This is due to Jupiter's composition, which is primarily made up of gas. On Earth, if you weigh 100 pounds, you would weigh 240 pounds on Jupiter (assuming you could find someplace to, well, stand). The only planet in our solar system with a higher density is Uranus.
Jupiter is composed mainly of hydrogen and helium with a small amount of methane present near its equator. The pressure at the Earth's core-mantle boundary is about 15 million tons per square inch (547 MPa), so under these conditions, a solid inner core would form before any other elements would be able to diffuse into it from the surrounding fluid mantle. However, because helium sinks through rock, there would be no outer core on Jupiter.
On Earth, gravity causes particles closer to the surface to move toward the center, while those farther away move away. Because of this phenomenon, the outer parts of Earth's atmosphere are depleted in heavier elements such as oxygen and iron. This is called "gravitational settling."
On Jupiter, because everything is so far away from the center of gravitational force, there is no reason for particles to move toward the center. Thus, there is no gravitational settling and no depletion of heavier elements in Jupiter's atmosphere.