The Second Day
12/04/2020
Now we have come to verse six:
(6) God said, "Let there be an expanse in the middle of the waters, and let it divide the waters from the waters."

THE EXPANSE
An expanse is empty space, or perhaps air. So the earth was still water on the surface, but the was also water higher up in the sky, in a layer. Now verse seven and eight.
(7) God made the expanse, and divided the waters which were under the expanse from the waters which were above the expanse; and it was so.
(8) God called the expanse "sky". There was evening and there was morning, a second day.

DAY TWO
So, in the next 24 hours the sky was made. We call this atmosphere these days.