how does the new testament, particularly writings about the 'heavens,' echo or diverge from this creation era understanding of the firmament?

Genesis 1:8

“God called the expanse 'sky'. There was evening and there was morning, a second day.”

This verse is part of the first creation account in Genesis, traditionally attributed to Moses. It describes the second day of creation, where God separates the waters above from the waters below, creating an 'expanse' or 'firmament' that he names 'sky'. This passage sets the stage for the physical structure of the world as understood by its ancient audience.

How does this ancient understanding of a divided 'sky' shape our perspective on the 'heavens' we perceive today?