A Brief Review Of “A Brief History Of The Universe”

A Brief Review Of “A Brief History Of The Universe”

 

This book has been updated several times, and may be different depending on which version you are reading.

A Brief History Of Time is a book written by none other than Stephen Hawking, a very important 21st century physicist. This book discusses simpler things such as time in a more complex perspective, and it also explains complex things like Black Holes in a simpler perspective. This book contains philosophical views and physical views of the universe. Not to mention, Hawking has a great sense of humor while explaining this book. He even shared that he lost a gamble of a 1 year subscription to a magazine because he theorized something incorrectly, but his friend’s theory is correct.

Although there are parts I don’t understand, The parts that I do understand and struck me the most will be explained (plus opinions and personal views) in this review.

Shape Of The Universe

Firstly, let’s get things straight.

The Universe is round, I said the universe, NOT the earth (I’m not saying it’s flat either). Why? The universe expands, it’s not immobile, it moves, and it’s growing by the second you’re reading this. If something expands, chances are it’s in the shape of a balloon, round. Have you ever seen a square balloon? I’m sure it’s a no. That’s cause for something to expand, it needs a flexible shape that can stretch, until it pops, like a balloon.

Wait? The universe can pop? Yes, it can. 20 million years ++ from now, the universe will end. What will happen? End to all known intelligence life? No, that’ll happen 5 million years from now, at least if there are no aliens. How?  The sun has limited fuel, and it’ll stop running one day, like a car without fuel, only if it’s a car, it stops, if it’s a star? It explodes. Let’s hope we can get out of earth by 4 million years from now.

Now We’ve gotten the universal shape of the universe out of the way? What about the earth? Let’s take a step back. Over the past few hundred years, many scientists and philosophers have their views on the earth’s shape.

  1. Ptolemaic Earth, developed by Ptolemy, a Greek Philosopher.
    • He Believes the Earth is round, with the universe revolving around it
  2. Flat Earth, developed from multiple catholic, and christian beliefs.
    • They believe the earth is flat, and the universe revolves around it
  3.  Heliocentric Earth, developed by Galileo Galei, completed by Sir Isaac Newton
    • This form of the universe is the one we adopt today, the earth is round, and it revolves around the sun.

Which one I believe? Heliocentric Earth, of course.

Space? Time? Which Is Which?

Do note that this is still theoretical. There are several views regarding Space and Time, so here are some of them.

  1. Space And Time
    • This form believes Space and Time as a separate entity
    • One can travel through space, but cannot travel through time.
    • We exist in space with this belief.
    • The flow of time does change space, but it cannot change.
  2. Space-Time
    • This form believes Space and Time as an individual united entity, consisting of 6 dimensions
    • Space-Time exists, but we do not exist in it
    • Space-Time is a wall, not a room, you don’t live in a wall, but you have to break the wall in order to get out. Time travel is debatable
    • Time flows and Space expands separately
  3. Time Warps and Space
    • This form believes of time as warps that curves to make it flow. The view on space is similar to the 1st theory
    • By warping or re-warping time, we can travel through it.
    • The flow of time is separate to space.
  4. Multiverse
    • This form believes of a universe being nothing but one of millions
    • Space expands and collides between multiple universes, and some say that Multiverses include past versions of time.
    • Time travel is debatable, so do dimensional travel.
    • Time flows as Space expands.

Right, not all of those forms are included in this book, but I’m mentioning them anyways because they are still relevant. Out of the many forms, Stephen Hawking jokes “So what is Time? Only Time will tell, whatever that is”. So far none seem to be correct or incorrect, we may never know.

Black Holes, stop Racism!

For the record, they aren’t black. . . No seriously, here is why

Black Holes are formed when a star dies and decays. Their insane mass creates a gravitational pull which is the signature of Black Holes. A strong vacuum that sucks things. What was once a star became a Black Hole, but the star-like qualities of them having light and producing energy is still there. A black hole still has energy, therefore it still generates light as well.

So stop Racism by calling Black Holes Black. They’re glowing, has energy and definitely not black!

F.Y.I The bet I mentioned earlier that Stephen Hawking lost is when he said is when he said black holes are black, his friend, said it radiates energy. This proves that even the greatest minds make mistakes.

So, why are they called black holes again? Their gravitational pull prevents light from escaping. This creates an illusion, of its own Gravity pulling it’s own light, making it seem black. Math shows that they must have energy, and everything is not what it seems, especially when seeing things through a telescope, and that thing is a few million light years away.

Writing style

As I’ve said, as a physicist, Stephen Hawking makes a lot of jokes in this book, and writes in a very casual manner. Not only that, after reading some other physicists books, and have listened to a Nobel Prize winner’s presentation/lecture at ITB, I’m certain that most scientists are casual, and has a sense of humor, except maybe when working.

This book might not be understandable by everyone, but it is still rather simplistic for a book in physics. The philosophical views might be slightly confusing, but this book is rather enjoyable, and can be read casually if you do like the book, and can remember stuff in it.

 

 

 

 

 

 

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