PV Gap

Sarah Said:

planets go thru the same stages? my "theory"?

We Answered:

If you think of the energy a planet recieves from the sun as cumulative, its possible to imagine venus could already be what the earth will become eventually. But there's no reason I know of to believe that we will eventually become a gaseous giant like Jupitor is now or that Jupitor will ever become earth-like.

I think the biggest difference is our mass which allowd most the lighter particles to be swept up by the sun, while out past a certain distance, the gasses were swept up by Jupitor and saturn and so on.