4. you got an atmosphere so in the distance it gets thick like a wall.

but there are a lot of impossible pictures with high zoom cameras,

so if you calculate the curve of the earth you shouldnt be able to see it on a ball earth

3. nobody knows exactly whats behind the ice wall

maybe there is a path to somewhere else but how i should know that

there is an antarctic treaty in place since 1958

i think in the fifties the governments found out that we are in an enclosed system and decided to hide it

2. dont know about petri dish but maybe you could describe it that way

1. the gravity part also took me a long time

and i am still learning

but i think density explains it well enough

and maybe some electrostatics

think about a balloon filled with air inside a water tank

the balloon would go up

its the same way around for denser objects in the air

going down

you forgot that your solar system is also traveling through space

maybe i should get some pictures

and videos ready for better presentation

did you watch "mylunchbreak" ?

maybe this place can be reset,

not sure how this would look like

its just all very interesting to me