The primitive world view of Heaven and Earth was quite small and analogue.
Earh was a large, circular disk (like a platter) and above it like a glass dome was heaven.
You could actually REACH heaven if you climbed up on top of a mountain!!
The Greeks, who were no slouches in science and philosophy, imagined Mout Olympus to be inhabited by all sorts of deities.
Moses had to go on top of Mt. Sinai to have an encounter with Jehovah and receive the ten words from his magic finger.
The Apostle Paul spoke about the Third Heaven which would be like a Penthouse today in which only the chief Deity of all would reside.
It is all PRIMITIVE thought being expressed in the Bible, my friends. The Tower of Babel threatened the VERY PLACE where God himself hung out. You just don't invade His majestic hood and get away with it!!