Day two (vv. 6-8). God put an expanse between the upper waters and the lower waters and made “heaven,” what we know as “the sky.” It seems that these waters were a vaporous “blanket” that covered the original creative mass. When separated from the landmass, the lower waters eventually became the ocean and the seas, and the upper waters played a part in the flood during Noah’s day (Gen. 7:11-12; 9:11-15).

The word translated “firmament” (expanse) means “to beat out.” In Scripture, the sky is sometimes referred to as a dome or a covering; however, Scripture nowhere supports the pagan mythological notion that the sky is some kind of solid covering. The luminaries were set in this expanse (1:14-17) and that’s where the fowl flew (v. 20).