What is the biblical universe?

Scripture has very little to say about what the universe is, though it is clear that it is made by God and proclaims his glory.

Much is made of claims by Paul in 2 Corinthian 12:2 about the third heaven, but in truth it says very little about the "layout" of the universe. As he understood it, the sky (earths atmosphere/clouds) could be described as the first heaven, the stars, sun and moon were beyond these could be descibed as the second heaven. God's eternal dwelling place is in neither of these areas, so it is described as the third heaven.

It is not presented as scientific language, and it is not giving a precise location - orthodox Christianity says that God's dwelling place is not spatial, because he was "there" before space was made. It's simply using the language of his time to try and clarify his experience.