The moon, though much less than the stars, is here called a great light, from its giving a far greater light to the earth than any of them. But on the fourth day he ordered and distributed this light, and made the sun, moon, and stars. 'Two great lights': God created on the first day, light, which being moved from east to west, by its rising and setting, made morning and evening. God also said: Let the waters bring forth the creeping creature having life, and the fowl that may fly over the earth under the firmament of heaven. And the evening and morning were the fourth day. And to rule the day and the night, and to divide the light and the darkness.

And he set them in the firmament of heaven to shine upon the earth. And God made two great lights: a greater light to rule the day and a lesser light to rule the night: and the stars. To shine in the firmament of heaven, and to give light upon the earth. And God said: Let there be lights made in the firmament of heaven, to divide the day and the night, and let them be for signs, and for seasons, and for days and years: And the evening and the morning were the third day. And the earth brought forth the green herb, and such as yieldeth seed according to its kind, and the tree that beareth fruit, having seed each one according to its kind. And he said: Let the earth bring forth the green herb, and such as may seed, and the fruit tree yielding fruit after its kind, which may have seed in itself upon the earth. The lower part of which divideth the waters that are upon the earth, from those that are above in the clouds. 'A firmament': By this name is here understood the whole space between the earth, and the highest stars. And God called the dry land, Earth and the gathering together of the waters, he called Seas. God also said: Let the waters that are under the heaven, be gathered together into one place: and let the dry land appear. And God called the firmament, Heaven and the evening and morning were the second day. And God made a firmament, and divided the waters that were under the firmament, from those that were above the firmament, and it was so. And God said: Let there be a firmament made amidst the waters: and let it divide the waters from the waters. And he called the light Day, and the darkness Night and there was evening and morning one day. And God saw the light that it was good and he divided the light from the darkness. 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. In the beginning God created heaven, and earth. God createth Heaven and Earth, and all things therein, in six days. Douay-Rheims Bible, Genesis Chapter 1 DRBO.ORG Summa-Theologiae.ORG

Genesis chapters 1 and 2