God is the Creator of heaven and earth.
When we say that God is the Creator of heaven and earth, we mean that He made all things from nothing by His almighty power. “All things were made through him, and without him was made nothing” (John 1:3) “For in him were created all things” (Col. 1:16).
In the beginning God alone lived. Then out of nothing, by His almighty power, He created heaven and earth and all things in heaven and on earth. Only God can create; that is, He alone can make something out of nothing. Time began with this creation. Before it, there was only eternity. “Before the mountains were made, or the earth and the world was formed, from eternity Thou art God” (Ps. 89:2).
God created heaven and earth and everything in heaven and earth. This means everything which is not God. “Heaven” refers to the angels and where they live; and “earth” to all the material universe, including the earth, stars, planets and all things and beings in them.
God created everything by an act of his will. “He spoke and they were made; He commanded and they were created” (Ps. 32:9).
In its first book, Genesis, Sacred Scripture tells the story of Creation. In the beginning, all was void and empty and dark; that is, there was nothing but chaos, which God Himself had created. Then out of this chaos God brought about order and law, creating heaven and earth. “In the beginning God created heaven and earth. And the earth was void and empty, and darkness was upon the face of the deep; and the spirit of God moved over the waters” (Gen. 1:1-2).