Jupiter's surface. Computer artwork of a view below the gas clouds of Jupiter's atmosphere, across a sea of liquid hydrogen on its surface. Giant lightning bolts can be seen between the liquid and gas. Miles beneath Jupiter's brown clouds of ammonia, hydrogen and helium the weight of the atmosphere far exceeds the pressures found in Earth's deepest oceans. It is believed that in this realm, somewhere between Jupiter's cloud tops and the planet's core, the atmosphere gives way to a planet-wide ocean of liquid hydrogen.