5th October 2005 - 02:05 PM
Hi "In the dark intelligently like z", solidspin, and guiding_light,
If it was able to be ingested then "A First Course in String Theory" by Zwieback would be the way to go. As Solidspin has mentioned I have started to read this one myself and it is very enlightening.
If that passage from Susskind that Yquantum originally posted is "above your" that is going to be scary. My suggestion is to google all the hard terms as you come to them by having a page of google open and type in "meaning of ---" or "define ----". Eventually you will "progress". Perhaps the next level from there (up ... down) will be "The Elegant Universe" by Brian Greene. There is an on-line TV Presentation of this on Nova I think (much simplified). You would find it in my back references... shoot here it is!http://www.pbs.org/wgbh/nova/elegant/
Just need cable to stream it to you.http://www.pbs.org/wgbh/nova/elegant/program.html
The book is better. That goes through all the ideas slow and easy.
Here is an excerpt from the book...http://www.wwnorton.com/catalog/fall03/greene1.htm
Guiding Light... Frame dragging is a gravitational process of "entraining" matter to move as in a kind of "gravity field drive". Read up on Gravity Probe B. This is the tangential form of this process. There is a linear form of this as well. Matter tows other matter around due to the curvature of spacetime. If matter is not exhibiting orbital motion the first thing I would suspect is this phenomena. We know that spiral galaxies have far too much mass to be "for real". Some kind of dark matter is involved. This is providing extra gravitational influence. Rather than each "particle" orbiting other particles in a "flatspace" it is my contention that mass is curving dimensions in the "Uberspace" and resulting in a gravity "pool". What this does is a kind of emergent behavior of this matter to entrain all the particles together as if each particle is towing all the other particles around and visa versa.
Why don't they all flop into a single black hole? It is subject to the gravitational equivalent of a Faraday's cage effect if it is homogeneously distributed over large volumes. What this means is unlike black hole formation where the attraction is purely through orbiting matter... in entrained matter "clouds" (whatever the matter might be) the further inside this highly dispersed "swarm" of particles... the less the attraction in any "particular direction". This is because the attraction works effectively like a partially hollowed out "sphere" of uniform density. Wherever you are on the inside of this sphere a smaller sphere whose surface is centered on your position indicates mass attraction from points "more central to the swarm" and points outside your "sphere" have little effect on you in similar fashion to the way charges reside on the surface of a charged sphere (inverse square law canceling effects... high school stuff really). This is generalized to a uniform distribution of "mass charge". Particles are attracted into the "cloud" of matter and the further into the cloud you progress the lower the gravitational acceleration becomes. A sort of "Hilbert Field". At the exact center of the "cloud" the mutual attraction as emergent behavior is dynamically balanced in all directions. Once a particle is in such a condition all the particles begin to move as one (like a flock of birds). The inertial frames of reference are all dragged with it as well. In a strange fashion according to General Relativity all the particle are "frame dragged" not only in space but in time as well. Of course the "cloud" of particles are a galaxy. I wrote a paper on this effect "a long time ago... in a galaxy far far away"... he he he!
I don't know what dark matter is but given that it is there... this will be what is happening.