It is the nature of gas to expand in all directions. So universal acceleration can keep the air from rising up and escaping, but what do you think keeps the air from escaping across the edges of the disk? What do you think is keeping our atmosphere in tact?
I believe in gravity
As far as I am aware, gravity can't work on a flat earth.
And just why can't it?
Well I for one don't think it couldn't work on a flat earth but something with enormous mass like the Earth would crush down unto itself to form a sphere so it wouldn't be a plane for very long.
I have already explained this:
I am actually working on a thoery concerning this. I believe the Earth is the base of the universe, a product of the expansion of matter cooling off after the Big Bang. As the universe expands, the earth is being pulled magnetically by gravity in four directions by each of the earth's four ends, which would keep it from rounding up. This can also explain continental drift and the earth as center of the universe, which we are already discussing in the "do you really believe in FE" thread
Basically what I'm saying is that since the Earth is the base of the universe, created as a product of the Big Bang, and as the universe continually expands, gravity pulls it with it. The earth is not any ordinary celestial body, and it is the ultimate dent in the whole universe (as in general relativity). The firmament is not some small ice dome, but the universe itself
John that is precisely why a lot of us are questioning your intelligence and saying that despite you agreeing with many RE things that you are less intelligent than the FEers who believe in a concpiracy. FEers typically deny gravity and favor UA because they understand how gravitational theory is supposed to work. They recognize that gravity would crush the earth to form a ball. They are convicted that the Earth is flat so to them it follows that what appears as gravity must be something else. You on the other hand just seem to cherry pick what is and isn't but it doesn't seem like you give enough careful thought to how what you are proposing would work.
I know how gravitational thoery works: gravity is not a force, but a dent in the universe. And I'm not cherry-picking, I'm using gravitational thoery in its whole, but converting it to a geocentric flat earth model