The core of Jupiter is probably composed of liquid rock, at a temperature as high as 24,000 K (43,000 °F). The core is small relative to the planet, about 20% of its radius, but it is still fifteen times heavier than the Earth.
Next comes a layer of liquid hydrogen that is under the pressure of 10,000,000 Earth atmospheres. This changes the nature of the hydrogen in such a way that it is able to conduct electricity as metal does, so it is called "metallic hydrogen." This generates the planet's magnetic field which is 20,000 times stronger than Earth's. This layer also makes up most of …show more content…
This composes the upper 25% of the planet.
Next, the hydrogen thins out into the gaseous atmosphere which is 1000 km (620 miles) deep. It is composed mainly of hydrogen and helium with trace amounts of methane, water, ammonia, and hydrogen sulfide. Some scientists believe that there are also polysulphur compounds and phosphine which lend their colors to the clouds.
Jupiter also has a faint ring system. It is comprised of one main ring, with fuzzier "gossamer" rings farther out. The system is only a few thousand kilometers from the sharp outer edge to the inner fuzzy edge which continues to the planet's atmosphere. The picture at left was taken by the Galileo spacecraft when the sun was behind Jupiter, so the rings were backlit.
Saturn is a gas giant. It's structure is very similar to Jupiter's. The core is composed liquid rock. Next comes a layer of liquid hydrogen. It is under such high pressure that the nature of the hydrogen changes, and is able to conduct electricity like metal. This generates the planet's magnetic field.
The layer on top of this is ordinary liquid hydrogen. Next, the hydrogen thins out into the gaseous atmosphere. It is composed of mainly hydrogen and helium with trace amounts of methane, water, ammonia, and hydrogen …show more content…
Neptune, like its twin, Uranus, has an atmosphere composed of hydrogen, helium, methane, and ammonia. The methane creates the blue color. Neptune's internal structure is also the same as that of Uranus.
The core of Neptune is probably composed of liquid rock. Then, farther up, the liquid rock slowly gives way to an ocean, primarily containing hydrogen, helium, and water, but also ammonia and methane. This "ocean" accounts for most of Neptune's bulk. The ocean slowly thins out into the atmosphere.
This atmosphere contains much more detail than Uranus'. It has swirls of clouds and high-altitude cirrus clouds, as well as gigantic storms.
Neptune also has a faint system of rings. The rings are made of pieces of material the size of a car or truck. There is about one thousandth of the matter in Neptune's rings as in Uranus'. If the rings were all rolled into a ball, the ball would be only a couple of miles across. That matter is spread across 125,000 km (77,500