Afterword from Lawrence Krauss' New Book - A Universe From Nothing

[pokerfan]

The video that spawned the book is simply amazing and is mantadory viewing by anyone interested in modern cosmology. I'm looking forward to reading the book.

Almost 2 years ago, Richard Dawkins and Elisabeth Cornwell asked me to deliver a lecture for the RDFRS at the AAI convention in Burbank California. I was happy to do that, but even happier to discover the reaction that followed. Much to my surprise, once RDFRS posted it to YouTube it became something of a hit, and now has over a million views. Almost a year later several friends of mine who had seen the lecture suggested I consider a book on the subject, and after discussing it with Leslie Meredith at Simon and Schuster's Free Press, the die was cast. I was very happy to have the opportunity to extend the discussions I gave in the lecture, and add significant background material describing the underlying science. Equally important I wanted to address and refine the key question of creation from nothing that I had been thinking about at length following the lecture, and also following several debates with theologians and the like. The last three chapters of the book focus on this. Upon completing the book, I asked my good friend RIchard to write the afterword, and he responded with a remarkably beautiful and insightful piece, which I am very happy that my publisher agreed to let us share on this site as a preview of the book. Unfortunately, our good friend Christopher Hitchens, who had agreed to write a foreword, became too ill to complete it, and died shortly after the book went to press. While we all mourn his passing, I am hoping that this book, and our other activities, will help carry on in some small way his remarkable legacy of skepticism, reason, and humanity. I am, in any case, very happy to have this opportunity to thank Richard and Elisabeth for helping me create something from nothing, and I hope you enjoy his afterword, and the book that accompanies it. -Lawrence Krauss

Afterword
by Richard Dawkins

Nothing expands the mind like the expanding universe. The music of the spheres is a nursery rhyme, a jingle to set against the majestic chords of the Symphonie Galactica. Changing the metaphor and the dimension, the dusts of centuries, the mists of what we presume to call “ancient” history, are soon blown off by the steady, eroding winds of geological ages. Even the age of the universe, accurate—so Lawrence Krauss assures us—to the fourth signi!cant !gure at 13.72 billion years, is dwarfed by the trillennia that are to come.

But Krauss’s vision of the cosmology of the remote future is paradoxical and frightening. Scienti!c progress is likely to go into reverse. We naturally think that, if there are cosmologists in the year 2 trillion "#, their vision of the universe will be expanded over ours. Not so—and this is one of the many shattering conclusions I take away on closing this book. Give or take a few billion years, ours is a very propitious time to be a cosmologist. Two trillion years hence, the universe will have expanded so far that all galaxies but the cosmologist’s own (whichever one it happens to be) will have receded behind an Einsteinian horizon so absolute, so inviolable, that they are not only invisible but beyond all possibility of leaving a trace, however indirect. They might as well never have existed. Every trace of the Big Bang will most likely have gone, forever and beyond recovery. The cosmologists of the future will be cut off from their past, and from their situation, in a way that we are not.

Read the rest

[tridim]

1. Energy isn't nothing.

E=MC^2

And my guess is that by the time galaxies are time-locked the majority of surviving civilizations will have a recorded history of the Universe.

[pokerfan]

2. of course it isn't

but that doesn't mean that it can't come from nothing. According to the uncertainty principle, particles (and therefore energy) pop in and out of existence all the time. These virtual particles are always created in pairs such that the total energy is zero and cosmologists have found....

Because if you add up the total energy of a flat universe, the result is precisely zero. How can this be? When you include the effects of gravity, energy comes in two forms. Mass corresponds to positive energy, but the gravitational attraction between massive objects can correspond to negative energy. If the positive energy and the negative gravitational energy of the universe cancel out, we end up in a flat universe.

Think about it: If our universe arose spontaneously from nothing at all, one might predict that its total energy should be zero. And when we measure the total energy of the universe, which could have been anything, the answer turns out to be the only one consistent with this possibility.

Our Spontaneous Universe

[tridim]

3. I'm assuming multiverses.

Each of which contains massive amounts of potential energy, and when they come in contact with each other the potential becomes real.

Then there is the other theory that universes live in bubbles inside of black holes (though I think these two theories are the same). We already know that there is loads of energy outside of super massive black holes at the center of galaxies, energy that would be completely invisible to anything inside the event horizon.

My personal wacky theory is that each and every black hole singularity within all universes is the same object. By definition the singularities all equal zero, and math says zero equals zero. I also believe every particle is a singularity that exists to constrain fleeting energy momentarily, which is what we observe as matter.