Nitrogen-Oxygen Gas Giant
Physically speaking, could a gas giant planet exist with
an nitrogen/oxygen atmosphere identical to earth's? Or is that gas
too heavy or light to sustain a planet of that size?
I doubt it, but theoretically it should be possible. In our solar
system all the biggest planets are gas giants with Hydrogen-Helium
atmospheres. I would guess that other solar systems show the same thing.
David H. Levy
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Update: June 2012