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Ever Wonder: What do we live in?

  1. Aug 26, 2010 #1
    Am I the only one that wonders where are we living?

    Thing is, we know that we're on a planet, which is in a solar system,
    in a galaxy, in the universe. But we have no idea what lies beyond
    the universe. More universes? Emptiness? Whatever there is, there's
    always something beyond it!

    When we think of the universe we think of something with astounding
    proportions. But for all we know our universe could be nothing but a speck
    of dust in something else.

    Sometimes I think that our universe is some sort of experiment created
    by some super advanced, super giant aliens. But even if that were true,
    there would still be another question, where did they come from? Because
    nothing gets created on its own.

    What I'm saying here is, "everything" is inside of 'something'. This is a
    mystery in itself. If there was nothing beyond the universe, then what would
    you find if you could travel to the ends of it? Some sort of wall? What if you
    dig through it? You'll always find something else, which really makes no

    It's pretty crazy when you think about it. Feel free to share your
  2. jcsd
  3. Aug 26, 2010 #2
    Watch this: .
    Last edited by a moderator: Sep 25, 2014
  4. Aug 26, 2010 #3

    Looks interesting. Off to watch it right now.
    Last edited by a moderator: Sep 25, 2014
  5. Aug 26, 2010 #4
    Hello, Johnnya. Yes, this is indeed a very common question to almost everybody who wonders about the nature of the cosmos. I can assure you people from very ancient times were wondering about the same misteries. For example, you could find a diversity of cosmological models and assumptions from the Ancient Greek philosophers about things that they couldn't even measure. Those questions are deep in the very nature of the human existence.

    Sometimes I like to fantasize about that, too. It is always fun to keep silence a little bit and wonder about what could lie 'beyond' the things we know, or the things we can see, or will able to see. The problem here is that, as far as I know, the laws of physics give us some restrictions about what can we know, or in other words, what information are we able to percieve.

    Take, for example, the Big Bang theory. According to this cosmological model, this was not an explosion in a pre-existing space, but the very expansion of space-itself. We can also pressume that there was no time before the Big Bang, or at least not as we know it. Time began at the very moment the universe did. So, if the space we're settled in began to exist at the moment of the creation of the universe, those other 'possible universes' could not occupy the same space.

    So it's not like some doccumentaries like to picture it, bubbles floating over an empty void, it's a bit more complex than that, or perhaps simpler. Who really knows?. Those questions might enter in the realm of philosophy as far as we are not able to know anything about them. There are things that simply push ourselves back. For example, limited speed of light, expasion of the universe faster than c at certain regions, etc.

    So yes, I think we've all wondered about that some time in our lives. It's just that it may be a little harder than we think to actually confirm that stuff.

    Take care!
    Last edited: Aug 26, 2010
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