SUMMARY: The cores of all 4 jovian planets are made that some combination of rock, metal and hydrogen compounds. The difference between the jovian interiors stays in the layers the surround the core.

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Sections:Planetary Size and DensityInterior StructureInternal HeatRelated linksRelated Lessons:Looking within Planets

Have you ever before wondered why Jupiter and Saturn are an extremely close in size, yet Jupiter"s average thickness is almost twice Saturn"s? The prize lies in exactly how you develop a planet out the hydrogen and also helium. The process is similar to stacking pillows one on top of another. As much more pillows are stacked on top, the pillows on the bottom end up being more and more compressed. The bottom pillows proceed to compress until a suggest when adding pillows doesn"t rise the elevation of the stack.


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Planet Radius vs. Mass(click to enlarge)

This helps define why the radii the Jupiter and also Saturn are really close, but Jupiter is more than three times together massive. Jupiter continued to collect hydrogen and helium in the atmosphere, enhancing its mass and compressing its inner until the average density was twice Saturn"s.

Average thickness (from highest to lowest)Neptune 1,638 kg/m3Jupiter 1,326 kg/m3Uranus 1,270 kg/m3Saturn 687 kg/m3

Notice that even though Neptune and also Uranus are smaller in size, your densities are much bigger than Saturn"s. This leads us to think that Uranus and Neptune need to have significantly different compositions than that of Saturn, with a lot larger fraction of higher-density product such together hydrogen compounds and also rock.


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All four jovian earth cores are comparable in composition. Each consists of a mixture of rock, metal and hydrogen compounds. Their differences stem from having caught different amounts of extr hydrogen and also helium gas indigenous the solar nebula. Jupiter captured so lot that it ended up v 300 times Earth"s mass.


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Jovial earth Interiors(click to enlarge)
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A Pie part of Jupiter"s Density
LAYERS surrounding JOVIAN CORES (FROM core OUTWARD):Jupiter and SaturnMetallic hydrogenLiquid hydrogenGaseous hydrogenVisible cloudsUranus and also NeptuneGaseous hydrogenVisible cloudsDensity, temperature and also pressure rise with street from the cloud tops.

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The jovian planets acquire their warm from the Sun and also from their interiors. Jupiter creates a lot of of internal heat and releases this warm by emitting heat radiation. In fact, Jupiter creates so lot internal warm that the emits virtually twice together much energy as that receives native the Sun. The only reasonable explanation is the Jupiter is still gradually contracting, almost as though it has not rather finished forming.

Saturn and also Neptune also appear to be emitting an ext energy 보다 they receive from the Sun. While us are details Saturn is not tho contracting, it appears clear the Neptune is quiet contracting. Uranus is the just jovian earth not emitting excess interior energy.