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trgui
2008-Apr-13, 10:04 AM
How dense is the core of Jupiter?

The enormous pressure (3000-4500 GPA) inside. Must lead to an enormous density? If I am not mistaken...

Eroica
2008-Apr-28, 03:11 PM
The centre of the Sun is only about 14 times the density of lead, so Jupiter's core density is not necessarily astronomical.

The Earth's core density is 13x103 kg m-3.
The Sun's core density is about 1.5x105 kg m-3.

Jupiter's density, I'm guessing is somewhere between those two, but I'm afraid I don't know the actual figure.

Tim Thompson
2008-Apr-28, 04:10 PM
See The Interiors of Giant Planets: Models and Outstanding Questions (http://adsabs.harvard.edu/abs/2005AREPS..33..493G); Tristan Guillot, Annual Review of Earth and Planetary Sciences 33: 493-530, 2005. Model central pressure is around 40,000,000 atmospheres with temperature about 20,000 Kelvins. Since the material is electron degenerate, or nearly so, the density will depend on the equation of state. None of the sources I have give a density, only the temperature & pressure, so it's up to you to figure out a density from the equations.

In fact, it is not known that Jupiter even has a "core", it is a model based assumption that could be wrong. So figuring out the internal structure of Jupiter, and whether or not it has a core at all, is one of the primary science goals of the upcoming Juno mission (http://juno.wisc.edu/) to Jupiter, which should launch in 2011 and arrive at Jupiter in 2016, if it remains on schedule.