If I'm reading this right, it gets up to ~600K by the time it hits the right pressure for Neptune. http://www.aanda.org/articles/aa/full/2005/03/aa1695/aa1695.

If I'm reading this right, it gets up to ~600K by the time it hits the right pressure for Neptune. http://www.aanda.org/articles/aa/full/2005/03/aa1695/aa1695.html http://www.aanda.org/articles/aa/full/2005/03/aa1695/aa1695....