Helo, Teeming Millions,
I can’t find the answer to this question anywhere and I’m too shame-faced to ask anyone directly, so here goes. When astronomers refer to Saturn and Jupiter et al as ‘gas giants’ does that mean they have no solid ground? Is there a central core with huge gas clouds, just the huge gas cloud, or do we even know? If this is a dumb question, please flame me gently. 
Gail Reed
Jupiter is generally thought to have a core of metallic hydrogen (a form of hydrogen that exists at extreme pressures). Don’t know about Saturn but would probably be the same.
See Scientific American May 2000 issue
Making Metallic Hydrogen
William J. Nellis
By re-creating extreme conditions like those in Jupiter’s core, physicists have at long last turned hydrogen into a metal. Future work on metallic hydrogen might bring revolutions in electronics, energy and materials.
Couldn’t find that article online, but I’ll try a search for the subject. Thanks anyway.