I can. If space outside the universe, Cajuns would have invented starships a long time ago, I gawrantee.
Yeah, like a Cajun who had discovered an infinite source of gumbo would come back here and tell us about it.
The visible universe wouldn’t repeat exactly like a bathroom tile pattern. And statistics says that it won’t start repeating a few light years beyond what we can detect. As I said, you would have to travel an inconceivable distance.
Also, you don’t need an Earth-like planet for an Earth’s sun-like sun. You do need an Earth’s sun-like sun to have an Earth-like planet though. Plus duplicate Earth wouldn’t need to stay duplicate Earth forever. This very instance it might be an exact duplicate, but maybe Earth II msmith keeps working while I go kick my boss in the nuts.
Here’s a link to the article:
http://www.sciam.com/article.cfm?colID=1&articleID=000F1EDD-B48A-1E90-8EA5809EC5880000
Kick mine while you’re at it, please. 
The universe thing was a joke.
My boss! My boss! I meant my boss! :smack:
A joke?
Just when I thought I was grasping some understanding…
Too late
Sorry to come back to this (but I think very slowly). This may be a daft question, but are you saying that there are an infinite number of points because you can keep dividing A to C into ever smaller pieces? If that is so, I thought that the smallest ‘unit’ is the Planck length, and what happens when you get to that?
It probably wouldn’t, but for all we know, it might. But I’d consider it a sufficent repeat if we could turn up an exact duplicate of a star or two. Nevermind the statistics, how can anyone know how many of the combinations of atoms in a given space are actually possible? And even though all of them are, we might encounter one of the “old” combinations before we find a new one, just like rolling two 3’s before you ever roll a four. But a big maybe, perhaps and might before all of this. I’m ONLY hypothesizing.
I guess the earth-sun could create a whole host of different planets under different circumstances, but notice again the “perhaps”. As an avid determinist, I’m constantly considering that situation A always leads to situation B. A duplicate of the sun is of course not a duplicate of the situation our solar system was in when it was created, but perhaps it’s either sufficient to create an earth-like planet again, or perhaps you wouldn’t get an earth-sun if not everything in relevant proximity (whatever that is) is exactly like when the sun was created.
Again, maybe, perhaps. I guess that’s what I like with discussing infinity (and wandering off, like I’m doing), that it involves a lot of guessing and fantasy. But I don’t considering my guesswork here completely irrational, though.
If the universe is in constant motion since the big bang. the universe is a baloon and we (and all the planets all the nebulae etc ), are living in the skin.
As per my original post question,
“If the universe is constantly expanding, then is it correct to say the universe is not infinite? And never can be?” I think after reading many considerate and thought provoking responses,
I am leaning to the comment made by yelimS.
To wit,
“with discussing infinity…that it involves a lot of guessing and fantasy.”
Because there are a finite number of different types of atoms and they take up a finite amount of space. It’s like taking a box of multicolored marbles and shaking it up. With enough marbles in a big enough box, you should see a particular pattern (say red-blue-green-red) appear more than once by chance.
The other thing is that most of outer space is empty void - essentially nothing. How could nothing NOT go on forever?
Yup… at least one pattern more than once. However, there’s no guarantee for any particular pattern showing up. Like I said before, you can flip coins or roll die for all eternity without ever getting what you wanted.
Ow. :eek: