Cosmology, Ontology, and God

It seems like a universe capable of creating itself and time would eliminate the need for a creator, but things are more complicated. Problems revolving around contingency would remain in such a universe. And some theologians have been arguing for ultimate causal answers in response to such problems.

http://www2.pictures.zimbio.com/gi/2010+Winter+TCA+Tour+Day+6+jOeC7oz6VPul.jpgWhile a four-dimensional space-time without boundaries may serve as a way for talking about the unfolding of time in the universe without its introduction from somewhere else, it is hard to believe that Hawking’s proposal is not a finite thing which needs further explanation. To be more exact, it seems in need of a divine explanation according to some. Hawking’s philosophical conclusions might then go beyond what his science allows. In his words, “if the universe is really completely self-contained, having no boundary or edge, it would have neither beginning nor end: it would simply be. What place, then, for a creator?”(A Brief History of Time, 140-141). Did the universe really arise from some slight transformation in space from which time arose and in which no meaning is to be found?

Paul Copan and William Lane Craig (Click the links if you are interested in this proposal. They have lots of material on their websites) have gone as far as arguing God’s transcendence and power to create out of nothing can be proven by investigating science. Their argument relies on a tensed theory of time. If some facts are tensed then so is time. For example, that Charlotte pledged to join a club in 1995 is a tensed fact. It was not true before 1995. So time is tensed and applies to the relation between the world and God. There was once a situation when God existed alone and the universe had not yet been created. Just as Charlotte pledged, God created and there was time before creation with God alone. This defense of a tensed theory of time lets Copan and Craig posit a moment of creation when combined with a rejection of a real infinite past.http://www.millennialstar.org/wp-content/uploads/2008/03/adams-finger.gif

Their rejection of a real infinite builds upon three relatively uncontroversial claims. First, physical events refer to changes in the space-time universe. Second, such events have an “earlier than” relation. And third, a beginning in such a scenario would be the first standard event rather than temporal instant. The controversial portion of the debate over creation ex nihilo centers on their claim that “the temporal series of past, physical events is not beginningless” (Creation out of Nothing, 198). To defend this claim they try and show that an actual infinite cannot be instantiated in the real world. An infinite temporal regress of events would be an actual infinite and cannot be real.

http://www.mathcs.org/analysis/reals/infinity/graphics/hilberts_hotel.jpgBy “instantiated in the real world” they have in mind adding up events to infinity. Obviously nobody can count up from one forever and reach infinity, but the real problem is when mathematical infinite set theory, a well-known fact, is considered in real-world scenarios. For example, take a hotel as an infinite set with its infinity of rooms occupied. Mathematically, if rooms one, two, and three onward to infinity checked out, all rooms would still be full because an infinite set cannot be exhausted. However, if rooms four, five, and six onward to infinity checked out, only three people would be left in the hotel. This is not how the real world works where guests leaving a hotel will open up rooms and matter financially. So an actual infinite cannot exist in the real world. The universe therefore had a finite beginning, and the Big Bang is the best scientific description of that beginning. The Big Bang also begs the question of what caused it and God’s free activity best explains its appearance from nowhere. However, by latching their creation theology onto a tensed theory of events rather than time itself, Copan and Craig have opened the door to a critique which they conveniently ignore. Their argument against an infinite past applies to consistently occurring events, not persistent realities.

http://www.vaticanbank.com/wp-content/uploads/2008/04/vatican-bank.jpgIf Copan and Craig have missed the mark then their error can be summarized by the way Hawking recounts his 1981 visit to the Vatican. “The participants were granted an audience with the Pope (John Paul II). He told us that it was all right to study the evolution of the universe after the big bang, but we should not inquire into the big bang itself because that was the moment of Creation and therefore the work of God. I was glad then that he did not know the subject of the talk I had just given at the conference – the possibility that space-time was finite but had no boundary, which means that it had no beginning, no moment of Creation” (A Brief History of Time, 166). Note Hawking’s language: there was no moment of creation. Since time did not exist prior to its emergence there was no distinct moment of creation because the four dimensional space-time it emerged from could persist “forever” before time was even real.  While Copan and Craig focus on events rather than time, the first event in Hawking’s case can persist continually until time emerges from it. It no longer becomes immediately clear that it begs the question of a creator. I am not sure Copan and Craig avoid Hawking’s critique. What do you think?

For other theologians the issue of contingency in Hawking’s proposal has prompted the revival of different strands within ex nihilo creation theology.

Langdon Gilkey and Mark Worthing have provided a sort of theological two-headed strike against the atheistic conclusions of Hawking. Gilkey’s role was to point out the limitations of science. No matter how much scientists like Hawking want to explain origins, their science will always be confined to talking about finite causes (“The Creationist Issue: A Theologian’s View,” in Cosmology and Theology). Worthing has simply taken this statement and directly applied it to Hawking. Three dimensional space combined with time forms a surface that is without a boundary but still finite in size. That is, Hawking’s proposal has offered one more finite thing, not the explanation for the existence of all things (God, Creation, and Contemporary Physics). In other words, the causal chain in the universe does not stop with Hawking. The way Gilkey sees it, any theory of the “beginning” reached by cosmologists can only involve another thing that could only be explained by the introduction of another thing, and so on forever. In other words, Hawking has perfectly displayed the ontological dependence of all reality on God as far as he is concerned.

Robert John Russell sees such ontological dependence as the core point of the doctrine of creation ex nihilo anyway. This idea does not have to do with wedding a theological affirmation to a specific picture of the Big Bang. If it did, Hawking would indeed appear to be eliminating the necessity of God as a cause. Rather, Russell sees ontological dependence as central: all matter, energy, and everything else that exists depend on God for that existence while God depends on nothing for existence. The ontological question of why something exists rather than nothing is not the same as understanding cosmological causes that only exist in relation to other finite causes. The theological affirmation in Russell’s view of creation has nothing to do with one specific moment before which there was nothing else but God. Rather, every event everywhere is always dependent on God for its existence even if it persisted forever.

http://ecx.images-amazon.com/images/I/515VcJ4u9aL._BO2,204,203,200_PIsitb-sticker-arrow-click,TopRight,35,-76_AA300_SH20_OU01_.jpgThis distinction between ontological and cosmological creation so that theology can support more than one scientific picture of the universe’s origin is an interesting impulse, but becomes rather complex once it is considered in depth. The nuances and problems it raises will be our topic next week, which you can prepare for by reading Gordon Kaufman’s short and very readable In the Beginning…Creativity.

The Cosmos is all that is…

http://scienceblogs.com/startswithabang/upload/2010/01/i_am_not_afraid_to_believe_in/bigbang.jpgDoes a finite universe that creates itself eliminate the need for a Creator God? Stephen Hawking answers with a yes. He pulls no punches again Christian creation theology in spelling out the implications he sees in his scientific work. A universe that started with a boundless sphere from which time emerged would need no extra Creator. The sphere sufficiently plays that role.

Hawking was always bothered by the popular picture of the Big Bang in which there is absolutely nothing and suddenly a brilliant explosion of matter and energy followed by rapid expansion. It seemed to be a scientific end-game because it had unscientific implications in his eyes. A singularity and Big Bang that appeared from nowhere begged scientists to accept the theological idea of creation ex nihilo. Astronomer Robert Jastrow’s frequently quoted conclusion to God and the Astronomers drives Hawking’s fear home:

Now we would like to pursue that inquiry farther back in time, but the barrier to further progress seems insurmountable. It is not a matter of another year, another decade of work, another measurement, or another theory; at this moment it seems as though science will never be able to raise the curtain on the mystery of creation. For the scientist who has lived by his faith in the power of reason, the story ends like a bad dream. He has scaled the mountains of ignorance; he is about to conquer the highest peak; and as he pulls himself over the final rock, he is greeted by a band of theologians who have been sitting there for centuries (107).

Hawking’s no boundary proposal covered last week is his explicit attempt to overturn Jastrow’s sort of thinking and keep scientific theories about creation alive. He has calculated the math required for a curved four-dimensional space-time that is finite with time contained within it, but boundless like a sphere. If this theory holds (likely in some modified version since Hawking’s theory is highly speculative), Hawking thinks that he will have achieved his goal of avoiding a singularity in which the laws of physics do not apply and before which scientists have nothing to say. This means that philosophers, theologians, and scientists would no longer “have to appeal to God or some new law to set the boundary conditions for space-time” (Hawking, A Brief History of Time, 136). In short, arguing from the presence of a temporal beginning of the universe to the existence of God is specious because “the concept of time has no meaning before the beginning of the universe” (A Brief History of Time, 8).

The reason this cosmological picture looks bad for theologians is that a boundless sphere can persist “forever” before expanding via the Big Bang because it persisted when time did not exist. However, lest I be accused of making astronomers into angry mean-spirited people who like to eliminate meaning in the universe, it is worth mentioning just how captivating and beautiful this Godless picture can be. I can think of nobody better to give that sense of beauty than one of the world’s greatest public scientists for whom Hawking has taken over in the realm of astronomy after his death, Carl Sagan. I’ll let him speak for himself, as he is far more poetic than I am:

http://www.youtube.com/watch?v=R7n71pm0K04

When Hawking Created the Heavens and the Earth

http://arenotalone.com/10-spiral-galaxy-m74-hubble.jpgEven though evolutionary biology is currently getting all the public attention about the relation of science to religion, an exploration of physics and astronomy seems appropriate given Stephen Hawking’s public reemergence with the series “Into the Universe with Stephen Hawking” currently airing on the Discovery Channel. The show is about physical cosmology, the scientific attempt to understand the origin, evolution, and basic structure of the universe. So let’s jump into the science starting with the figure who set cosmology on its modern course.

In 1924, Edwin Hubble discovered that nearby galaxies were moving away from the Milky Way Galaxy at a rate that increased the further away those galaxies were from our own. This might make more sense if you think about how raisins move away from each other while baking raisin bread or what would happen if you drew a bunch of dots on a balloon and then inflated it. More importantly, the “redshift” of other galaxies was increasing the further they were from earth. This shift is like the Doppler Effect.

http://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Redshift_blueshift.svg/500px-Redshift_blueshift.svg.pngYou’ve probably noticed that trains have a different pitch to the sound they make as they approach you compared to once they have passed by. That is because the frequency of sound waves emitted while approaching and moving away is different. The redshift is the same thing, only for light sources, and Hubble was able to detect the redshift of other galaxies. It was becoming clear that space was expanding. This work was further supported by the discovery of uniform background radiation.

The temperature of the radiation is remarkably consistent throughout the sky (the differences in color in this picture only amount to 0.1 degrees kelvin or less). Such strong consistency in temperature indicates that the universe was once in a rather homogeneous state in which a massive amount of energy capable of producing such radiation was released. http://ffden-2.phys.uaf.edu/212_fall2003.web.dir/eli_sonafrank/background_radiation.jpgBy extrapolating back in time from these observations, a singular point of infinite density has been posited as the standard scientific explanation. It then “exploded” in the Big Bang and that infinite density was released and developed into the expanding universe we live in today (more about the microphysics in the chart of the Big Bang another week). All of this happened 14 billion, yes with a b, years ago. However, there are problems with this picture.

Planck Time must be used to explain the early moments of the Big Bang. A Planck unit is approximately 5×10-43 seconds in length, a time after the singularity before which scientists have no working model. In other words, the best scientific knowledge currently available cannot get at the actual existence of a singularity, but can only propose it as the best current theory for the start of the Big Bang. This dilemma has led Steven Hawking (his book A Brief History of Time is still a fun and easy to read introduction to cosmology) to pursue the application of quantum mechanics, relativity, and a tentative theory of quantum gravity to explore the possibility of a testable hypothesis for the early conditions of the Big Bang for scientists to work with.

Hawking’s uses a rather hypothetical approach to understanding the early conditions of the Big Bang in which he considers every possible path particles could have taken through space. By calculating the histories of waves passing through all points, he can eliminate those with equal amplitude and consider only the most probable paths. If you don’t follow that last sentence, all you need to know is that any distinction between space and time vanishes in this approach. The end result is a curved four-dimensional space-time that is finite with time contained within, but boundless like a sphere. This theory amounts to a rejection of the idea that the universe began at some point in the past.

The concept of time would have no meaning before it emerged from curved space-time. In other words, a boundless sphere can persist “forever” before expanding via the Big Bang because it persisted when time did not exist. So Hawking’s contribution to the cosmological landscape is a theory in which a temporally finite world can exist forever without a beginning. Odd indeed, but a real possibility with growing evidence in its favor (we will cover the possibility that we are living in a multiverse, but you can read The Cosmic Landscape by Leonard Susskind if you want a preview of that REALLY odd cosmos).

So that does it for our first adventure into science, setting up our discussions later this month about what scientists, philosophers, and theologians are making of this data. Leave comments and let me know if anything is unclear. I’ll do my best to clarify. Even worse, if you are following absolutely nothing, let me know if I need to write more, less, or change the tone of my writing about science in future posts. If the science we cover each month is not understood, then venturing into theological possibilities will be fruitless.