| | Well, I'm no laureate or anything... But open and closed universes refer to a sort of cyclical view of the universe.
Think of moments after the Big Bang, with pieces of star-stuff flying at lightspeed, and Will Smith diving neatly to safety nearby. Today, these pieces of starstuff are now galaxies and things, but they are still expanding outward from the energy of the Big Bang. Imagine if you drew points on a deflated balloon, then inflated it; the points would spread. In the same way, galaxies and other ethereal material are expanding away from the epicenter, and from each other.
At this point, the momentum from the explosion could maintain the expansion of the universe to forever. What is preventing this? Well, the gravity of the rest of the universe behind this matter. Keep in mind, all the time this universe is expanding, gravity is trying to pull everything back to its center. I have no idea what is going to happen to the universe, but I'm not sure I can care.
Either way, imagine if this expansion did continue. Matter would eventually be spread out evenly among infinite space, and nothing else would ever happen. This would be called an open universe. Or, gravity will eventually win over this outward motion, and the universe will collapse back on itself, condensing back into another massively-dense thing out of which will come another Big Bang. This is called a closed universe, and is interesting to contemplate. Perhaps our universe has come out of one before. Perhaps this has been going on for eternity and Perhaps we should simply ask Dick Clark. There exists a third possibility, that the outward motion will balance with the inward pull of gravity, and things will begin to rotate around a gravitational center, as planets around a sun.
And that's about it; one of the many theories trying to account for the 'something out of nothing' thing. Now that you have conquered the universe with a thought, doesn't going to get something to eat seem a trivial and underserving task?! yeah!
The universal border theory (I don't know what it's actually called; it was just discussed in conversation) claims that when you journey to the edge of the universe, you approache an edge that once you attempt to cross, you only move backwards into space. or something. As my MIT-student (major in theoretical physics!) friend was explaining this, I analogized, "like that space-battle videogame where you can go towards the edge, but once you cross it, you end up on the other side of the screen?" He said this was quite right, but in four dimensions, and instead of moving through space, one moves through something else. Supposedly through this last dimension. Right; sigh.
Sometimes, physics crosses a line into metaphysics that I cannot forgive or understand. I mean, I respect the understanding of the immediate world physics has brought us, but these sorts of conclusions seem to defy all concepts of Newtonian physics, and even existence and reason; it seems a contradiction to be able to accept both our world and hypotheses like this one. It seems to employ the same sort of thought-evasion that people utilize to justify Jesus being one and three, and the planet being able to freeze in its rotation, and rain for forty days, Jesus walking on water, etc.
Keep in mind that I am not comfortable in being uncomfortable with theoretical physics; after all, I am almost playing the role of the persecutors of the first discoverers. Consider this: my reasons are "well, it's too abstract," "This borders on pure fantasy," "this defies previously established concepts," "No one has any use or benefit from this," "These ideas are too new," "No one's ever done this before." Sound familiar? I think I sound like the early dissentors to Eintstein's relativity, and I am open to that (partly because of experimental data). Well, despite my hate of being in such positions, I will leave such fanciful theorizing up to the physicists, and I will simply twiddle my thumbs and scream to fly to the stars as soon as they announce they can.
As for the strong force, any study of force is intriguing. I still don't have a concrete concept of what makes up things like light, and electromagnetism, and gravity; and then comes this strong force thing that necessitates a theory for strongforce-itons as responsible for gluing electrons to protons? 0_o
There just needs to be a whole 'nother internet just for physics; it's sooo big.
|
|