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Originally posted by ImaFungi
my last question is,,, does space exist within a black hole, like space exists interstellarly?
or are the conditions so strenuous,, the energy and matter levels so high and dense,,, there is no room for space as we (dont) know it?
also galaxies moves through interstellar space -time?
lets imagine a galaxy moving a million light years........ does the supermassive black hole ever "touch" spacetime that surrounds the galaxy,,, as it moves,,,,, or is it as a contained center/nucleus,,, in which interstellar space could never approach or enter it?
Originally posted by tremex
Originally posted by ImaFungi
my last question is,,, does space exist within a black hole, like space exists interstellarly?
or are the conditions so strenuous,, the energy and matter levels so high and dense,,, there is no room for space as we (dont) know it?
The density of the black hole isn't uniform. At its center called "singularity," the density is said to be infinite and that creates a problem for cosmological theories. In the "less dense" regions there is really no space with physical properties resembling the space created by the absence of matter, like the void between star systems. It's impossible to monitor what's going on beyond the event horizon of the black hole, because no radiation can escape from there and stuff can be only theorized.
also galaxies moves through interstellar space -time?
Galaxies cannot move trough interstellar space, but through intergalactic space.
lets imagine a galaxy moving a million light years........ does the supermassive black hole ever "touch" spacetime that surrounds the galaxy,,, as it moves,,,,, or is it as a contained center/nucleus,,, in which interstellar space could never approach or enter it?
I'm not sure what you are asking. Does your question relate to the question whether a black hole at the center of a galaxy can eventually swallow the whole matter, dark or visible, that the rest of the galaxy is made of?
Originally posted by ImaFungi
,,, it is completely baffling,, nonsensical,,incredulous, and awe inspiring.
Originally posted by tremex
Originally posted by ImaFungi
,,, it is completely baffling,, nonsensical,,incredulous, and awe inspiring.
You can also try this: Imagine a complete physical nothing represented by space that doesn't have any boundary. There is no way that the physical nothing would change its composition so some events would take place in there, like the emergence of matter. That means some matter always had to exist in the space our universe is expanding into. If the space is infinite in size and time, then it took almost infinite amount of time for the gravitational influences to scoop the very rare matter in the space into a point, the singularity that expanded through Big Bang into our universe. Under this scenario, there is no other universe in the space except ours.
edit on 6-10-2012 by tremex because: (no reason given)
You can also try this: Imagine a complete physical nothing represented by space that doesn't have any boundary.
. The proposition that the energy of our Universe has always been here is completely absurd and wrong.
energy cannot be created or destroyed...
something cannot come from nothing,.,.,.
We were taught that you never get something for nothing. But now, after a life time of work, I think that in fact you can get a whole Universe for free.
~ Stephen Hawking
The Universe must be flat. Why? Well there are two reasons... there's the one I normally say, which is it's the only mathematically beautiful Universe... which is true. But there's another reason I don't usually talk about, but I'll talk about here. It turns out, that in a flat Universe the total energy of the Universe is precisely zero, because gravity can have negative energy, so the negative energy of gravity balances out the positive energy of matter. What's so beautiful about a Universe with a total energy of zero? Well only such a Universe can begin from nothing... and that is remarkable. Because the laws of physics allow the Universe to begin from nothing. You don't need a diety. You have nothing, zero total energy and quantum fluctuations can produce a Universe.
The Universe is flat. It has zero total energy and it could have begun from nothing. And I've written a piece, of course I got a lot of hate mail, saying that in my mind this answers the crazy question that religious people always keep throwing out, which is - "why is there something rather than nothing". The answer is there had to be... if you have nothing in quantum mechanics you'll always get something. It's that simple.
~ Lawrence Krauss
Quantum fluctuations are essentially space-time turbulence. At the quantum scale space-time experiences turbulence/fluctuation due to Heisenberg's Uncertainty Principle. These fluctuations exist for an extremely brief period of time before neutralizing. The neutral state of space-time has a zero energy level, but the Heisenberg's Uncertainty Principle causes random turbulence to occur, energy which has not always existed, the turbulence is the energy, it's the potential difference from the neutral state.
quantum fluctuations are some type of energy which are caused by something.,,.. if quantum fluctuations did create all the energy in the universe,,, then once again,, all the energy in the universe was always around.,..
There is no reason you should jump in the bandwagon, just research this stuff and draw your own conclusion. I am just arguing my point that energy has to come from some where using the knowledge I have about this topic. I believe it because all the physics fits together perfectly and supports the observations we have made so far.
im not saying i believe anything you say,, i take it all with a grain of salt and try to understand the views and opinions best i can,,, you can state it like it is dogma and i admire you for having faith in your beliefs,, but i dont trust your knowledge of the true nature of reality enough to hop on that bandwagon,.,,.
It's not a quality of space-time, it's a quality of quantum mechanics. Space-time, on the quantum scale, simply inherits that quality due to the Heisenberg's Uncertainty Principle, as do all quantum objects. You are right in a certain sense that the energy is in the form of particles, but they are virtual particles. Quantum fluctuations are basically virtual particles. They exist all throughout space-time, constantly appearing then disappearing. We know these virtual particles exist and that they come from the vacuum of space because we have forced virtual particles to become real in recent experiments (Scientists create light from vacuum), virtual particles also help explain why black holes emit radiation (see Hawking Radiation theory).
you dont know this...... Space - time is not composed of particles,.,..,.. if scientists have an instrument located in space - time,,, and they detect turbulence/ fluctuation ,,, this turbulence/ fluctuation is not a quality of space - time itself,, it is a quality of particles which exist in the volume of space - time.......
so then there is no such thing as empty space? what is a vacuum,, and how can particles virtual or not come from them? what are virtual particles,, what do they exist as?
Originally posted by ChaoticOrderIn fact there would be an infinite number of copies of you out there. There would even be copies of our Universe out there.
Originally posted by ChaoticOrder
Except... if you're talking about empty space as "nothing", you'd be wrong. Empty space is not nothing, it's the very fabric from which all energy is derived, quantum vacuum fluctuations gives rise to everything we see. The proposition that the energy of our Universe has always been here is completely absurd and wrong.