I first read about this concept in one of Carl Sagan's books. The argument goes something like this:
An infinitely old universe would disprove the existence of God, since an infinitely old universe would never have had to be created.
Now I dont want to discuss the implications of the argument itself, i quite understand what the author is getting at.
I am, however, having a hard time understanding the concept of an infinitely old universe.
When we studied infinite series a couple months ago, there was always a starting point, at say n=0, 1, 2, 3... or any real number, but it was a well defined starting point and went on into infinity.
I dont understand how a universe of infinite age could have come into existence in the first place. Even an oscillating universe must have had a beginning, some trigger to this oscillation, even if the oscillation pattern repeats for indefinite (or infinite) amount of time.
So can someone please explain to me the concept of an infinitely old universe? I really have a hard time grasping the concept of something that did not have a starting point.
Disclaimer: I'm not trying to start a religious debate. I'm just trying to understand the concept of an infinitely old universe. Please dont feel obliged to argue from a religious point of view because I want to know the basis of the concept from a scientific perspective (and I dont want the thread to get locked).