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Black Holes: The Key to Understanding the Universe

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Reality Is Not What it Seems: The Journey to Quantum Gravity by Carlo Rovelli, translators: Simon Carnell, and Erica Segre. Call Number: Shields Library QC178 .R69313 2017

A singularity is what you end up with when a giant star is compressed to an unimaginably small point." Quantum mechanics implies that the whole space is filled with pairs of virtual particles and antiparticles, which are constantly materializing in pairs, separating, and then coming together again and annihilating each other. Despite the book’s brevity, Rovelli doesn’t flinch from discussing the tougher concepts. He warns you that you might find some of them a little confusing. I must confess that I’m still a little hazy on whether or not my inability to remember the future is just a perceptual illusion, or if it’s a fundamental consequence of the underlying physics. But Rovelli reassures you that none of that really matters and that what’s important here is the experience of being transported. If that’s true then the book more than does its job. Stephen then went on to Cambridge to do research in Cosmology, there being no-one working in that area in Oxford at the time. His supervisor was Denis Sciama, although he had hoped to get Fred Hoyle who was working in Cambridge. After gaining his Ph.D. he became first a Research Fellow, and later on a Professorial Fellow at Gonville and Caius College. After leaving the Institute of Astronomy in 1973 Stephen came to the Department of Applied Mathematics and Theoretical Physics, and since 1979 has held the post of Lucasian Professor of Mathematics. The chair was founded in 1663 with money left in the will of the Reverend Henry Lucas, who had been the Member of Parliament for the University. It was first held by Isaac Barrow, and then in 1669 by Isaac Newton. For rest all the topics discussed with relevant theories is par excellence. language is good to read and understand but very simple for a book.A jaunt through space history . . . with charming wit and many pop-culture references' – BBC Sky At Night Magazine All of this disregards entirely that I am already sort of tied up with a pseudo-career in a different scientific discipline and do not relish the thought of attending university again. Nor am I particularly skilled at focussing on multiple things, fond of starting over, or withholding anything of value from the theoretical physicists that they haven't already got covered. The issue with today's small pop science books is that they don't intend to provide coherent information about something but for commodifying the simplified works of complex minds to the public under the pretext of preaching that knowing the name of something is intelligent rather knowing about something and being able to clearly understand it.

While saying this, I think the authors try their best to convey these complex ideas to the layman. I have read considerable amount of books about the universe and this is the hardest so far. But even though this it's hard to read, I think we can see through these theories from a mathematical point of view. Because at the end of the day it's all about maths.

But this is a book for the layperson and Rovelli understands this limitation, glossing over finer detail in pursuit of an impression of the wonder that lies at the heart of the cosmos and his theorising. And in his hands it’s an effective technique.

Hawking lets us into his thoughts a bit, like a tiny window, not too much. But he talks about this special connection he feels with Sir Isaac Newton. Also, he seems to see himself standing on the shoulders of Albert Einstein and building off of the legacy that Einstein’s life work left behind.It’s always tempting to bask in the self-congratulatory delusion that if I just really concentrate on something hard enough I’d be able to understand it. But this book proved me wrong from the very first spacetime Penrose diagram that slowly sent my protesting brain over the event horizon and to the singularity while being simultaneously vaporized and spaghettified. Stephen Hawking discusses a grand unified theory in a brief history of time. The idea behind a grand unified theory is that laws can connect general relativity and quantum mechanics. It is also sometimes called the theory of everything. Gravity! The Quest for Gravitational Waves by Pierre Binétruy (Oxford: Oxford University Press, 2018). Call Number: PSE Library QC178 .B56 2018 At the same time, it takes several days to get enough data to get a clear picture over a long period. So it’s an enormous task that takes place over years and years. The authors try to describe the spacetime by something called Penrose diagrams. I think I did a good job understanding it to some extent. But when it came to quantum entanglement in the last chapters, I kind of gave up. Because the equations involved with those chapters were more complex than the rest.

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