How insights into `supercritical fluids` could help us understand the interior of the giant gas planets
(PHYSorg.com Physics)

The temperature and pressure inside Jupiter range from about -100°C near the edge to about 15,000°C and 50m times the Earth`s atmospheric pressure in the middle. Saturn, Uranus and Neptune are similar pressure cookers. As we descend into Jupiter, we may see matter in the gas state, in the liquid state and in another, less well-known state, called the `supercritical fluid` state.