---
product_id: 28702646
title: "God's Equation: Einstein, Relativity, and the Expanding Universe"
brand: "amir d. aczel"
price: "$104229"
currency: COP
in_stock: true
reviews_count: 11
url: https://www.desertcart.co/products/28702646-gods-equation-einstein-relativity-and-the-expanding-universe
store_origin: CO
region: Colombia
---

# God's Equation: Einstein, Relativity, and the Expanding Universe

**Brand:** amir d. aczel
**Price:** $104229
**Availability:** ✅ In Stock

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- **What is this?** God's Equation: Einstein, Relativity, and the Expanding Universe by amir d. aczel
- **How much does it cost?** $104229 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/28702646-gods-equation-einstein-relativity-and-the-expanding-universe)

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## Description

God's Equation: Einstein, Relativity, and the Expanding Universe

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## Customer Reviews

### ⭐⭐⭐⭐ 







  
  
    Historically accurately detailed but lacking in physical insight
  

*by D***O on Reviewed in the United States on May 12, 2018*

Very strong on historical and QUALITATIVE contents of the Physics & Math, BUT.... Dr. Amir (sadly deceased) should have had better PEER REVIEW & input..... for instance, he repeatedly (4 times, including the Index reference) misspells Eugenio Beltrami’s name as Beltarmi (could it be the Editor or publishers fault, as well?) (all on the same page & in the Index, too!) and has TWO references (conflicting) for the meaning of “rho” (the Greek letter for density) in the chapter VERY late in presenting the Equation the book is titled for...(they are poorly explained as being from different equations....with the connection between them omitted) Chapter 11 pages 151-152.  He did some original research though and turned up previously unknown correspondence with Erwin Freundlich, But his exposition of the actual equation (in 16 chapters) is sketchy, cursory and lacking in detail (to be a bit redundant for emphasis).  He starts out at the ending (1998, before the discovery of the Higgs boson @ CERN) in Chapter 1, then proceeds from Einstein’s birth in chapter 2 and finally arrives back at the cosmological constant in Chapter 11.  he skips forward and backward, timewise to develop some understanding of the mathematics needed to grasp curved space-time and occasionally presents very important insights, such as the effect of special relativity in altering the ratio of a circle’s circumference to its diameter).  Special relativity, unfortunately, is glossed over a bit.  His expression for the relativistic metric is a gross oversimplification poorly explained (he uses c = 1 without stating so, and most likely means the deSitter metric) and which does not reduce to the non-relativistic Newtonian metric, omitting time completely and getting a sign wrong for the radial component.  However, his historical discussions and digressions are not aimed at those with mathematical or physics backgrounds.  Sometimes the digressions are a bit far afield, though interesting and additionally, his insight into physics is on a rare occasion sorely lacking (he finds Newton’s description of light being bent by distant solid matter to be mysterious, when all Newton most likely meant was the bending of light by a prism).  He chooses to make physics as mysterious as a new religion, which it actually is, but not to explain or dwell on what is understood and how & why in detail.

### ⭐⭐⭐⭐ 







  
  
    Recommended, but Not Strongly... 3.5 Stars
  

*by D***N on Reviewed in the United States on May 18, 2013*

I recommend this book, but not strongly, for a number of reasons.  I'll do the pros before moving on to the cons.  First, I really don't know of a book that covers exactly what this book does, and does it in a way that is accessible to the broadest possible audience.  In fact, I don't know any historical treatments of the development of Einstein's equation geared toward intellectuals.  This book, then, fills an important literature gap in popular science.  It is difficult to say that Aczel does a "good" job in this book, because he does some things so exceptionally well that it strikes the senses that he does other things so poorly.  He writes well, and is very much to the point, in some chapters, and others just seem like a potpourri of information qua space filler, as one other reviewer noted.  For example, chapters 11-16 are, individually, either poorly done and scant, or lacking cohesion with the whole project.  (Chapter 1 isn't great either.)  Yet chapters 2-10 are either well done or very, very good.  An example of this is Aczel's leaning on historian of physics, John Stachel, and brings additional insight into Stachel's intellectual products.  The chapters pertaining to the pure mathematics are particularly well done.  Some points of clarification are so lucid that I think the moderately intelligent, decent reader would completely understand otherwise inaccessible mathematical formalism.  This aspect of Aczel's work, even beyond his nice writing style, is a major achievement of the book.  Additonally, I thought Aczel did a good job of researching some areas of the history, upon which little prior writing exists.  Being fairly knowledgeable about the content of the book, I took away a number of valuable points, details, and grist for my mill.As far as the cons, I tend to ride Aczel's works a bit harder than most, because I feel he is capable of more than he sometimes produces.  Re: My point about the disparity in quality in various chapters within a single work; this book would be closer to a five-star book if Aczel could establish greater consistency.  As it is, reading pages 13-148 of 220 could be read, dismissing the rest, to maximize the value of the text, though the reader might feel a little disoriented with the lack intro and conclusion.  When other reviews express agitation over Aczel's lack of depth, it is because he notes that so-and-so did such-and-such, but does not say what entailed the such-and-such: you really don't have any more information than you began with, apart from a superficial factoid.  Another issue with this book is the lack of historical and philosophically informed writing, probably, because Aczel consults scientists rather than historians and philosophers trained in the science.  A good example is the fact that Poincare, historians believe, played no role in Einstein's theory development.  As far as letters have shown, Einstein did read one work of Poincare's (on time) by 1902, and there is no evidence that it influenced his thought, as Aczel (and trained physicists, without an historical background, might think).  For a philosophical example of lacking insight, Aczel says nothing about the idea that physicists (many physicists at around the turn of the century were the philosophers, as well, e.g., Duhem, Reichenbach, Poincare, etc.) were very interested in the fact that there seemed to be a philosophical difference between geometric space and physical space, such that physical space did not uniquely determine the applied geometric space.  In Einstein's compiled volume of "Ideas and Opinions," it can be seen that Einstein had been similarly fascinated by this; and it wasn't as Aczel seems to suggest, that Einstein just came up with the idea of applying non-Euclidean geometrical coordinates/metric to physical space, but it was part of an on-going and historically significant discussion between philosophical minded physicists, mathematicians with philosophical interests in physics, and physics-interested philosophers.Overall, only part of the book (chapters suggested above) will likely interest the intellectual without much exposure to this subject, but the book holds extended merit for the lay audience, being so accessible and on a unique subject matter.  For the latter, I do suggest giving it a look to see if it suits potential interests.

### ⭐⭐⭐⭐⭐ 







  
  
    Absorbing Story of Einstein, His Equation and Cosmology
  

*by T***A on Reviewed in the United States on October 15, 2000*

Amir Aczel describes Einstein's equation of general relativity that governs the behavior of the universe from its birth to a possible role in the near future. The story is beautifully woven together with the latest finding in cosmology and the riddle of creation. While a few lines of equations are shown, their meaning is explained by simple terms that can be understood by lay readers.On the basis of Einstein's letters that became accessible recently, Aczel tells for the first time the great physicist's efforts to get a prediction of his theory experimentally proved. Thus the author well succeeds in revealing a human side of the person who discovered God's Equation. This is quite a readable and absorbing book.

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-01-25*