God commanded for there to be a firmament, or an expanse in the middle of the waters, that it might divide the waters, and it was so (Genesis 1:6, 7).
Then the Bible says,
“And God called the firmament Heaven. So the evening and the morning were the second day” (Genesis 1:8).
This is not heaven, the home of God, but the sky and the universe. In one day with a simple command, God brought the entire sky, whether daytime or nighttime, into being.
Who can this be, that the sky and the universe obey Him!