Genesis 1:16-19

God made the two great lights—the greater light (the sun) to rule the day, and the lesser light (the moon) to rule the night; He made the [galaxies of] stars also [that is, all the amazing wonders in the heavens]. God placed them in the expanse of the heavens to provide light upon the earth, to rule over the day and the night, and to separate the light from the darkness; and God saw that it was good and He affirmed and sustained it. And there was evening and there was morning, a fourth day.