On Sep 27, 6:30*pm, "Mark Earnest" wrote:
"BURT" wrote in message

...

I believe they started as a huge rock metal core greater than the
mass
of the earth that was capable of gathering their huge gas atmospheres
through great gravity. Gas by itself does not possess enough gravity.

No, but starstuffs do.

Those starstuffs I take to be the heavier elements that would make the
gas giants core capturing the gas.

Mitch Raemsch