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| Posted By: Bruno Posted On: May 24, 2007 Views: 658 | RE: No infinities Sherri, not Sherry...sorry :-| |
| Posted By: Sherri Posted On: May 24, 2007 Views: 651 | RE: No infinities It's cool, Bruno! It is quite remarkable to imagine we can imagine how infinite infinity might be. Back to the fun of reconciling our imaginations with known variables... Sincerely, Sherri |
| Posted By: Bruno Posted On: May 25, 2007 Views: 648 | RE: No infinities Hi Sherri. Oops I mixed two different notions together in the last comment, I didn't say anything about a matter of definition in that one (I was a little tired, so I'm excused). :-D Anyway, I still find it both a little frustrating but also a little amusing to see, how the different theories really can't coexist in any logical manner. Some say the universe is expanding at an accelerating speed, however others still use the term "infinite" about the universe. Something infinite can't possibly expand, can it? I have just read an article on the Niels Bohr Institute in Copenhagen's web site, which states, that the accelerating expansion of the universe seems to be caused by the dark matter in the universe, a sort of "vacuum effect". Now, if the dark matter issues some vacuum effect, it should work against the expansion rather than causing it, shouldn't it? If not, I can only come up with one logical explanation - the vacuum must be considerably larger outside the universe, and if so, it cannot possibly be caused by the dark matter (?) The only way the dark matter can cause it, is if it causes an INCREASE in the pressure, am I correct? Now, if there's absolutely nothing outside of the universe, how can there even be a vacuum, anyway? Then there's definitely something, namely a vacuum. Something is required in order to create such an effect, namely a difference in pressure. Even if that's true, that indicates at the same time, that it should indeed be possible to leave the universe, since the pull from outside is larger than the pull presented by the universe (?) |
| Posted By: Bruno Posted On: May 25, 2007 Views: 647 | RE: No infinities By the way, I have considered another possible explanation to the accelerating expansion. Someone seems to forget one important factor: that time is another dimension in the universe. I would suggest, that the rapid expansion of the universe simply happens because of time passing by. That would make sense, if time is another dimension. As I have understood, the universe expanded extremely rapid in the first few seconds after the Big Bang, although almost no time had passed by then (of course). This happened not because of the time factor, but rather because of the tremendous energies released. Later on, the universe cooled down and the energy partially turned into matter, thus the expansion started to slow. At some point, however (when sufficient time had passed by), the time factor became greater than the other factors, and then, of course the expansion would start accelerating. The more time passed by, the bigger the universe. Does this make any sense, or is it completely nonsense? If so, the theory of time being just another dimension cannot possibly be true, and in turn, the relativity theory must obviously be flawed. Hummmm... ;-) My point in all this is: something does not hold true in the existing theories, but where? :-| |
| Posted By: Bruno Posted On: May 25, 2007 Views: 645 | RE: No infinities Huh...unless of course, the entire future of the universe is already written c".) |
| Posted By: Keith Mayes Posted On: May 25, 2007 Views: 641 | RE: No infinities I think you are over complicating what is already a complicated theory about the expansion of the universe. Okay, the universe is expanding away from the singularity that was the Big Bang. If indeed the rate of expansion is increasing instead of slowing down - as would be expected by gravity pulling in all the matter in the universe - then some hitherto unexplained energy must be causing it. Hence the birth of dark energy, a kind of vacuum energy. Okay, so far so good except we have no idea of what this dark energy is, apart from calling it dark because we don't know what it is! However, if found it would explain the increase in the rate of expansion. It would be a force that exists throughout the universe and has the opposite effect of gravity inasmuch it forces matter apart instead of drawing it together. Hope that makes sense. |
| Posted By: Bruno Posted On: May 25, 2007 Views: 639 | RE: No infinities Yes, it does...except for one thing: I still don't think it explains, why the universe expands. If the dark matter acts in opposition to the gravity, it would merely pull the galaxies from each other WITHIN the universe, wouldn't it? If it would cause it to expand, it would still have to interact somehow with that big void outside of it. I can't tell if I'm overcomplicating things, however I do know that the subject is complicated enough for humanity to lack understanding of the phenomenon. |
| Posted By: Bruno Posted On: May 25, 2007 Views: 638 | RE: No infinities After considering it for a while, I can see your point of view...and from that point, I agree with you. Thus the dark matter doesn't cause the expansion, it merely enhances it. |
| Posted By: Keith Mayes Posted On: May 25, 2007 Views: 635 | RE: No infinities Yes, simply put I believe that to be right. The universe is expanding because of the Big Bang and the dark energy is fuelling the expansion. There isn't much point in speculating what is outside of our expanding universe as we will never be able to find out, we can only theorise about it and we do have M theory and so on. |
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