Big Bang has nothing to do with creation ex nihilo, and neither does a scientific version of Big Bang deny the existence of God.
Big Bang theory does not imply or deny creatio ex nihil. One should not associate Big Bang with Creation. Big Bang only adresses the cosmic evolution of that which was previously created ex nihilo. When the creation of contingent being ocurred in relation to the Big Bang event is an unknown.
Big Bang is speculative cosmology that attempts to explain what happened in the past up to a certain point, what is happening now, and what will happen in the future. The theory leaves open the question whether anything happened prior to the universe, from a scientific perspective. Theoretically there could have been a series of previous Big Bangs in which the universes collapsed and expanded. Imagine a balloon being inflated and deflated several times.
At some point, all contingent and non-necessary beings were created ex nihilo by that Being which is non-contingent and necessary being. This being we know is the Christian God. Just when that point of creation was in relation to the Big Bang cannot be extracted from Genesis, especially since Genesis is not teaching science. The human author of Genesis conveys Yahweh’s message in the context of the cosmogony accepted by the Hebrews of the time. The cosmogony is a primitive one in which a flat earth rests on pillars, a firmament exists above the earth, with waters above the firmament, flood gates to let the water down (rain), and so on. The only thing revealed in regard to the Hebrew view of the world, is that this primitive view is one of those things Biblical literalists conveniently refuse to interpret literally.
Nonetheless, ancient Hebrew cosmogony is not a scientific view of the world, and the Hebrew picture is one of a very small universe. Its the picture believed by the primitive Hebrews. God did not decide to reveal a correct and scientific view of the universe to a primitive culture. He left it to the mind of man to discover the facts of the universe over time. Hence, scientific endeavors.
Since Genesis shows that there is order in the universe, that everything that exists was given existence by Yahweh, and that whatever he created is good, then creation is a proper object of study for man. This positive view of creation, was promoted by the Church and contributed significantly to the rise of science in western civilization. Many people are unaware of the philosophies and religions of the past, which taught that the material world is evil and that there is an evil co-principle or god that exists along with a god that is good. What Genesis teaches is a true theology in opposition to the false theologies of the pagans of the time.
What Genesis teaches, or that which is God’s message to man is something more important for the ancient Hebrews than a radical upset in their flat-earth cosmogony. Imagine if the author had known and used a true cosmogony. He would have had no credibility with the primitive Hebrews, and God’s message would have gone unheeded.
Again for emphasis, Big Bang cannot be associated with creation *ex nihilo. *Some people are misled by Stephen Hawking’s version of Big Bang, which Hawking says leaves no room for God. Hawking’s cosmology and cosmogony are atheistic. Whether Hawking’s version of Big Bang is ultimately intelligible, and whether it is also acceptable, has already been decided by God. Hawking just doesn’t know it yet.
Underlying vast generalizations in science are metaphysical views about the universe. There is nothing about a particular, scientific and non-Hawking version of Big Bang, that is not consistent with the Catholic faith and the metaphysical principles of St. Thomas Aquinas. It is only inconsistent with a particular way of interpreting Genesis 1, and not with certain other ways of interpretating the Biblical account of creation.
My posts, of course, are open for anyone to jump in and ask questions or make objections, to which I will respond. However, keep in mind that even though I especially enjoy receiving hate mail, it is not allowed on CAF. I guess CAF doesn’t want me to have tooo much fun.