What Happened this Day?
The second day of creation is what God calls to our remembrance when he wants to get our attention.
Isaiah 44:24 (ESV) Thus says the Lord, your Redeemer, who formed you from the womb: “I am the Lord, who made all things, who alone stretched out the heavens, who spread out the earth by myself. . ."
Isaiah 42:5 (ESV) Thus says God, the Lord, who created the heavens and stretched them out, who spread out the earth and what comes from it, who gives breath to the people on it and spirit to those who walk in it. . ."
God did two, related things on the second day. He spread out the waters (or earth as Isaiah describes it) and stretched out the heavens to make the expanse of space. We don't know if these two events are independent or related. Perhaps the spreading out of earth material caused a simultaneous stretching out of space or the stretching out of space caused the earth material to be spread out.
The earth material that God spread out to the vastness of the expanse of space is the material he used to form the stars on the fourth day. The Bible says on the fourth day God made (Hebrew asah) the sun, moon, and stars, not created (Hebrew bera) them. 'Create' means to bring into existence out of nothing. That is what God did on day one in creating the heavens (paired spaces) and earth material. On the other hand, 'make' means to form and fashion from existing material. On the second day God spread out the earth material He created. On the third day He used some earth material to form Planet Earth. On the fourth day He used the earth material spread throughout space to form the sun, moon, and stars.
Fluids or Waters?
Was this a Big Bang?
God defined 'Paired Spaces'