Is the surface of Jupiter liquid, this is of particular interest because Jupiter has a gaseous atmosphere and liquid hydrogen?


1 Answer 1


Not exactly. Actually, the transition between the gaseous atmosphere and the liquid hydrogen layer is so gradual that, if observed (which it has not), it would not be clear where to draw the line between the two.

The idea of a "surface" depends on the phase diagram for the elements involved. Here's an example on of a phase transition diagram for Hydrogen, the main (but not only) constituent of the Jovian atmosphere.

enter image description here
(Image Source: https://www.pnas.org/doi/full/10.1073/pnas.1007947107)

At he Critical Point, it is no longer possible to distinguish between a gas and a liquid.

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