Earth Fusion Core; weather circulations

[Pyrotex]

Marvin Herndon and others’ hypothesis that the current Earth is the remaining rocky core of a gas giant planet is interesting, and, at first glance, reasonable. However, a cursory examination of it reveal at least 2 major disagreements ....

Another disagreement comes from gravitational models of Earth. Venus shows us that an Earth-sized planet can hold considerably more atmosphere than we have now. Were Venus in Earth's orbit, the extra distance from the Sun would allow even more.

Having said that, Venus' current atmosphere is still a small fraction of its total mass. Hydrogen and helium are not easily held by a planet, unless you've got the mass, or you're far enough away from the Sun's heat.

In my mathematical opinion, the amount of atmosphere that CAN be retained is non-linear (exponentially rising) with planetary mass. Earth at best might be able to hold onto 1/10 (of its core mass) in atmosphere. A planet four times as massive might be able to hold onto an equal mass in atmosphere.

Final point, I think the theory still stands that Earth's very thin atmosphere (compared to Venus) is due to our Moon stripping it away, not entirely to the Sun.