A Brief History of Time, first published in 1988 with a total of 12, tells the most advanced knowledge of cosmology, including cosmic images, space-time, expanding universe, uncertainty principle, elementary particles and natural forces, black holes, the origin of the universe, wormholes and time travel. Hawking describes his understanding of the universe and various propositions in related fields in this book.

Although the contents in the book are clear and tidy, there are still many complicated concepts that are difficult to master, and even some words and theories only exist in fluent reading, not understanding, but this is also because the knowledge fields related to cosmology are too abstruse.

The Universe in the Shell, the title of which comes from Shakespeare's famous play Hamlet, believes that even if he is locked in a shell, he still thinks he is the king of infinite space. In this book, Hawking first introduces a brief history of relativity;

That is, how Einstein laid the foundation for relativity and quantum theory, discussed how the shape of time given by general relativity is related to quantum theory, and then described what the universe looks like in the shell, and predicted whether the future will protect the past and whether time travel can really be realized.

Hawking wrote extended materials, with a brief history of time in the front and a shell in the back. The former mainly talks about the space-time view of general relativity, while the latter is more complicated. Although it is a popular science book for the general public.

In other words, Hawking's main purpose in writing A Brief History of Time is to explain his contribution to physics to the public. Because the theory he wants to promote is really abstract and difficult to understand, such a book must have some technical content.

The reader's praise of any secondary auxiliary knowledge in the book is flattering and doesn't hit the point. If you want to pretend that you have not only read a brief history of time, but also know more updated physics than this book, you can say this:

In A Brief History of Time, Hawking naturally mentioned that the expansion speed of the universe is bound to be slower and slower under the action of gravity, and also introduced three possible results about the future of the universe: always expanding, expanding first and then contracting, and the expansion speed just keeps the universe from shrinking. But he never imagined that the universe was accelerating!

Baidu encyclopedia-a brief history of time

Baidu encyclopedia-the universe in the shell