God likes change and created a world that was supposed to do so.
He starts out with both an undeveloped area and an ideal or goal or model for the development that will take place.
In the beginning, God created the heavens and the earth. The earth was without form and void, and darkness was over the face of the deep.
So the earth is the area that needs changing, not the heavens. God starts changing the world by bringing it form, fullness, and illumination. Included in this change are the creation of stars in the “heavens.” This indicates that the initial “heavens” of Genesis 1.1 is not some place you can travel in a spaceship. All the area filled by stars is technically part of the “earth.” The initial “heavens” of Genesis 1.1 is God’s throneroom and his angels. That dimension was made instantaneously complete (at least compare to the earth). It is the model and the source of change on “the earth.”