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Originally posted by kdog1982
... my thought was what about infrared.
It has been said that when the universe stops expanding,and all the stars have used op they're fuel,it will be a cold,dark place
We propose a new theory of gravitation, in which the affine connection is the only dynamical variable describing the gravitational field. We construct the simplest dynamical Lagrangian density that is entirely composed from the connection, via its curvature and torsion, and is an algebraic function of its derivatives. It is given by the contraction of the Ricci tensor with a tensor which is inverse to the symmetric, contracted square of the torsion tensor, $k_[\mu\nu]=S^\rho_[\lambda\mu]S^\lambda_[\rho\nu]$. We vary the total action for the gravitational field and matter with respect to the affine connection, assuming that the matter fields couple to the connection only through $k_[\mu\nu]$. We derive the resulting field equations and show that they are identical with the Einstein equations of general relativity with a nonzero cosmological constant, if the tensor $k_[\mu\nu]$ is regarded as the metric tensor. The cosmological constant is simply a constant of proportionality between the two tensors, which together with $c$ and $G$ provides a natural system of units in gravitational physics. This theory therefore provides a physically valid construction of the metric as an algebraic function of the connection, and naturally explains the observed dark energy as an intrinsic property of spacetime. Comments: 7 pages
If spacetime torsion couples to the intrinsic spin of matter according to the Einstein-Cartan-Sciama-Kibble theory of gravity, then the resulting gravitational repulsion at supranuclear densities prevents the formation of singularities in black holes. Consequently, the interior of every black hole becomes a new universe that expands from a nonsingular bounce. We consider gravitational collapse of fermionic spin-fluid matter with the stiff equation of state in a stellar black hole. Such a collapse increases the mass of the matter, which occurs through the Parker-Zel'dovich-Starobinskii quantum particle production in strong, anisotropic gravitational fields. The subsequent pair annihilation changes the stiff matter into an ultrarelativistic fluid. We show that the universe in a black hole of mass $M_\textrm[BH]$ at the bounce has a mass $M_\textrm[b]\sim M^2_\textrm[BH] m^[1/2]_\textrm[n]/m^[3/2]_\textrm[Pl]$, where $m_\textrm[n]$ is the mass of a neutron and $m_\textrm[Pl]$ is the reduced Planck mass. For a typical stellar black hole, $M_\textrm[b]$ is about $10^$ solar masses, which is $10^6$ larger than the mass of our Universe. As the relativistic black-hole universe expands, its mass decreases until the universe becomes dominated by nonrelativistic heavy particles.
reply to post by mainidh
Black holes are everywhere. If it's believed to be true, then at the centre of every massive galaxy is a black hole. How can it be conceived that one black hole can be the cause of all others?
According to computer models and theory, it is not necessary for a galaxy to have a black hole at its center. The mass of the stars and gas clouds in the galaxy attracts and this gravitational attraction holds many galaxies together. This said, many, and probably most galaxies do have massive black holes at their center, including ellipsoidal galaxies and spiral galaxies with central bulges.
Originally posted by TrueBrit
Personally I prefer to think on the possibility that rather than universes existing within black holes, that black holes are merely like the thundering valves of the heart of existance. Let me explain myself somewhat.
If you look at a picture of a black hole, taken through certain arcane instruments, you will see two cones, eminating from the centre. I remember clearly a particular image that would be perfect, which I believe was taken by the Chandra x ray telescope, although I cannot find the blessed thing for the life of me.
Now, these cones were actually emmissions from the black hole, not matter pouring into it. We KNOW that matter and energy, even photons, are sucked into a black hole, and we know that it produces output also. In this way I believe that a black hole is merely a valve of sorts, which shunts matter and energy from one universe, into another, while outputting energy in other forms, into our own, from other universes.
Of course, there is no actual evidence for that at the present time, however, I was not wrong when I suggested the existance of the super massive black hole when I was ten years old, and I am fairly in love with this idea in a similar fashion. Wether there is any truth in it will be a matter for the years ahead to prove or disprove, and in any event which ever outcome will no doubt create more questions than it answers. It is a delicious thought though.
Originally posted by TrueBrit
reply to post by PurpleChiten
The image of which I am speaking was actually as close to raw as you can get. It was shown on the BBC a few years back, during one of the Beebs many interesting science television shows. The picture showed black detail on a white background, and the black hole was represented by a dark elipse, from which these cones eminated.
This was not a doctored image, or an artists representation, or a 3d model.
Originally posted by circlemaker
Nice to see people thinking outside the box. I've heard similar theories for years but they were typically conceived of by laypeople (as opposed to the scientific clergy).
I've been working on a theory of the universe for the past 13 years. It's more math than physics, but as far as black holes go the implication is that whatever is on the outside of a black hole is reflected on the inside.
The event horizon is a dark mirror (time is reversed on the other side). Everything between ±1 and ∞ is reflected in between ±1 and 0. ±1 is the event horizon, 0 is the inner singularity, ∞ is the outer singularity. pic
Math is full of reflections. I enjoy finding them and connecting them with physics.
Funny thing about the big bang... it's the beginning of time too. Try to go "before" the big bang and you'll get a reflection of what comes after it. Like the positive and negative numbers being reflected around 0.
The big bang is like a black hole except we're experiencing it in a time-like fashion rather than space-like. Light speed is the event horizon for it.
It's really exciting stuff. Ironically, I consider black holes to be the simplest things in the universe considering their main components are defined by 0, 1, and ∞... or at least that's how I define them. I haven't heard anyone else define the event horizon like I do but the singularity is typically defined as 0, so you can extrapolate from there.