DoctorOfSpace wrote:A-L-E-X wrote:Source of the post What about such things as gravity and sterile neutrinos? They would not be tied to any one universe or brane and could thus travel or leak out
Those things are still locked within the expanding shell of spacetime, neutrinos and gravity don't travel faster than light.A-L-E-X wrote:Source of the post I love these ideas of yours! So you favor a cyclic multiverse but noninteracting?
Strictly from our universal perspective I think our universe repeats. I rather like the elegance pf Sean Carroll's model suggested in his paper here
Given enough time and given the current known laws of physics it seems like the universe in the far future can reach an unstable point where entropy can reverse for a moment and the universe can start again. If this is the case then perhaps our universe is cyclic. Its elegant in that it has no beginning and no end, no real cost to exist, and the entire system is in balance with itself. It also seems to suggest there may be a large number, if not infinite, of shells of spacetime from previous universes expanding well outside of our cosmic horizon. In my mind I see it as a repeating universe forever without any changes, but even if each reboot the universe is slightly different, it still suggests that given enough of these the same universe will form and we will continue to repeat our existence forever.
Could be wrong, probably am, but that makes the most sense to me.
Ah, I guess it depends on which theory you're talking about. Brane theory holds that gravity leaks into our brane from a different brane and one of the conjectures about sterile neutrinos (this isn't one of the three flavors of neutrinos we've already discovered but a fourth type that is thought to comprise a slice of dark matter) is that sterile neutrinos are not affected by any of the four fundamental forces but gravity because they are not tied down to our brane.
I like cyclic cosmology well and remember Sean Carroll from the Discover blogs. I like his idea too- it reminds me of a cyclic cosmology theory i've been following that has gathered support- about the universe "coming back empty." It actually doesn't break the laws of thermodynamics.
By the way interesting convo in the other thread about the likelihood of life- I responded there- we can still have life survive GRB's- it just depends on what kind of life you're talking about lol.
I just read that, it reminds me of something I've been thinking and writing about, except that in mine, it's two universes that are in balance with each other (including each with a reverse arrow of time compared to the other but both forward compared to themselves) that create baby universes and both descend from a larger universe, with the entire structure cyclic both in space and time.
Interesting how different people think in parallel ways:
https://supermanbatmanalexthegreatest.s ... y.com/2631
I started this a few years ago
I conjecture on a new theory of everything; in my theory each dimension can be analoged to a primary color..... in our universe each spatial dimension would be equivalent to an additive primary color (RGB) with time as the background (Black) with a complementary spacetime which consisted of dimensions that analoged to the subtractive primary colors (CMY) with complementary time as the background (White) as one space expanded the other contracts and vice versa (because the arrow of time flows opposite to each other but forward within each), It's been peer reviewed and it seems there's some excitement over this as this would solve the dark matter / dark energy problem by unifying the strong nuclear force and gravity (the strong nuclear force is carried by gluons and color charge and analoging dimensions to primary colors is gravity's version of color charge) so now we have a strong force-gravity unification and an electroweak unification and we just need to combine those dualities. There are four layers to the omniverse, with universes of different dimensions in each layer (the number of dimensions in each layer bear a pythagorean relationship to the other layers and each universe has a parent superverse from whose parent black hole it was created. If you loop through the entire hierarchy of universes you end up back where you started, so the omniverse is not only cyclical time, but also in space. I guess I'll leave that for a sequel lol.
BTW if there are multiple timelines they would be created right after the big bang, by the force of inflation and be emergent diverging timelines along two dimensions of time (think cartesian coordinates) and if the cyclic model is correct and dark flow does reverse the expansion of space, the time lines would converge once again with a Big Bounce as the universe deflated (rinse and repeat.) The antiverse would have opposing cycles (because the arrow of time was opposite compared to ours) and if there was someway to construct some sort of device (a la star gate) to tap into the barrier which separates the two (consisting of light, which does not experience the passage of time) than both time and long distance space travel would become possible through the second temporal dimension (which keeps each timeline intact)...... according to Einstein the past, present and future all coexist and it is we who move through them, so theoretically this should be possible. He also stated that the universe (or omniverse on a larger scale) created us in order to understand itself better, forming the framework for a cosmic collective mind which encompasses not only humans, but animals, plants, alien life, even whole planets (Gaia Theory, which has been proven multiple times) and even stars and galaxies, the only difference is the density of the level of consciousness, although planets (for example) are much larger than any single life form, their density of consciousness is much less, with their "memories" (fossil record) spread out over a much larger area, so any one spot (on our scale) is seemingly lifeless. But it's not. The planet consists of a complicated series of checks and balances and delicate interplay between different parts that can and should be considered alive.