Just Six Numbers

The Deep Forces That Shape the Universe

De: Martin J. Rees

Narrado por: 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.

Not enough ah ha.

Sound physics but all the stuff that makes physics boring. I would never recommend or read again.

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.

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.

Outdated

Many have happened in cosmology in the last 20 years. Disappointed, he did not mention LeMaitre, the first person to propose the bigbang theory, a Catholic priest.