Just Six Numbers

The Deep Forces That Shape the Universe

By: Martin J. Rees

Narrated by: John Curless

How did a single "genesis event" create billions of galaxies, black holes, stars, and planets? How did atoms assemble - here on earth, and perhaps on other worlds - into living beings intricate enough to ponder their origins? What fundamental laws govern our universe?

This audiobook describes new discoveries and offers remarkable insights into these fundamental questions.

There are deep connections between stars and atoms, between the cosmos and the microworld. Just six numbers, imprinted in the "Big Bang", determine the essential features of our entire physical world. Moreover, cosmic evolution is astonishingly sensitive to the values of these numbers. If any one of them were "untuned", there could be no stars and no life. This realization offers a radically new perspective on our universe, our place in it, and the nature of physical laws.

©2000 Martin Rees (P)2018 Recorded Books

The simplicity and complexity of our universe

Pretty technical but good job making it understandable and breaking the concepts down to digestible portions. Should be listened to attentively because it’s not something you’ll pick up casually.

Amazing travel through the physics of space

If you’ve got at least a little background in math and physics (and chemistry), you will SO totally geek out on this book.

Very good even if a bit dated these days

As the title says, the book is a bit dated now so some of the stuff is going to be wrong or at least not fully right but if you go in accepting that, the meat and potatoes of the book is still excellent information and the narration is very good. I did listen to it on 1.3x speed. as the narration cadence was very slow but the narrator is very clearly spoken so speeding it up was almost not noticeable in regards to quality.

Tour de Force of Cosmology! Still relevant.

"Just Six Numbers" is an immensely entertaining and thoughtful exploration of our universe across every conceivable scale. I am familiar with all of the science described in this book, but was impressed with the easy connections Martin Rees draws across time and space. The tone is conversational, but the impact is mind-blowing! Yeah, I liked it.

Astronomer Royal, Sir Martin Rees, presents an evocative overview of cosmology, as of about 1999. While the science has advanced, the central mysteries still exist, so the book remains as relevant as when it was written. Rees presents information and anecdotes relevant to these numbers that serves as a 'grand tour' of particle physics, astronomy, and cosmology. While his presentation is approachable, he doesn't shy away from the science at a conceptual level.

The six numbers that serve as guideposts from quantum physics to cosmology are:
N ≈ 1036: the ratio of the electrostatic and the gravitational forces between two protons
Ω ≈ 0.3: the ratio of the actual density of the universe to the critical (minimum) density required for the universe to eventually collapse under its gravity
λ ≈ 0.7: The ratio of the energy density of the universe, due to the cosmological constant, to the critical density of the universe
ε ≈ 0.007 ratio of mass lost to energy when hydrogen is fused to form helium
Q ≈ 1/100,000 The energy required to break up and disperse an instance of the largest known structures in the universe expressed as a fraction of the energy equivalent to the rest mass m of that structure, namely mc2
D dimension to equal three

Some reviewers fault the selection of only six numbers or dispute the selection of these six. The author never states these numbers are exclusive of any others. Rather, per Wikipedia referring to "Just Six Numbers," "Any plausible fundamental physical theory must be consistent with these six constants, and must either derive their values from the mathematics of the theory, or accept their values as empirical." Criticisms regarding these specific six numbers fail to see the forest for the trees. Rather, the larger context of a small set of physical values inextricably relating to the larger universe is the most compelling message of the book.

The author does not shy away from the universe's fine tuning which opens possibilities of intelligent design and multiverses, among other ideas. I think this is a natural progression of cosmology: to consider how the universe in which we exist itself came into existence. Rather than settling on one possibility over another, he takes a scientific perspective that what we cannot understand today may be understandable in the future.

Accessible.

I really need to sit down and re-read this in print or maybe listen again as a more active listen I still gleaned a lot from this, but it got away from me a bit about mid way because I was listening at work and zoning out a bit. Seems worth the effort of listening again and paying close attention this time.