This kind of shit is awesome. Absolutely boggles my mind. Was just reading the other day about the size of the universe, etc. Here were a few things I took from what I read:
- the universe is suspected to be about 14 billion years old
- we don't know how big the universe is (or will be). The reason why is because, if the universe is expanding (like we think it is), then it can only have expanded so far in the amount of time (14 billion years) that it's been in existence. Light can only travel so far in a given amount of time.
- if we accept the Big Bang theory (that the universe was created from the explosion of "stuff" in an infinitesmally space), then we would have to accept that other "Big Bang" could have occured before and after our "Big Bang," creating in essence multiple universes. After all, the little space that existed that exploded and created our "Big Bang" had to exist in "something" - some area, some "space" - and therefore other "Big Bangs" could have been created in that same "space." Therefore, in theory, there could be an infinite number of "universes." (This is where my head starts to explode.)