THE TITLE OF THIS BOOK DIFFERS by only two letters from that of a book 1st published in 1988. A Brief History of Time was on the London
Sunday Times best seller list for 237 weeks and has sold about one copy for each 750 men, women, and kids on earth. It was a remarkable
success for a book that addressed some of the most hard issues in modern physics. still those hard issues are the most thrilling, for they
address big, basic questions: What do we really know about the universe? How do we know it? Where did the universe come from, and where is it
going? Those questions were the essence of A Brief History of Time, and they're also the concentrate of this book.
Websitesherlock
In the years since A Brief History of Time has been published, feedback has come in from readers of all ages, of all professions, and from all over the
world. One repeated ask was for a new variant, one that maintains the essence of A Brief History still explains the most important
notions in a clearer, more leisurely manner. though one may expect that such a book could be entitled A Less Brief History of Time, it was
also clear from the feedback that not many readers are seeking a lengthy dissertation suiting a college level course in cosmology. , the present
approach. In writing A Briefer History of Time we maintained and extended the essential content of the original book, still taken care to
maintain its length and readability. This is a briefer history indeed, for some of the more technical content was left out, but we feel we have
more than compensated for that by the more probing treatment of the material that's really the heart of the book.
Aleksa
We have also taken the chance to update the book and include new theoretical and observational results. A Briefer History of Time
describes recent progress that was made in finding a complete unified hypothesis of all the forces of physics. In specific, it describes the
progress made in string hypothesis, and the "dualities" or correspondences between seemingly different theories of physics that are an indication that
there's a unified hypothesis of physics. On the observational side, the book will include important new observations like those made by the Cosmic
Background Explorer satellite COBE and by the Hubble Space Telescope.
Breadcrumbssolutions
Some forty years ago Richard Feynman said, "We are lucky to live in an age in which we're still making discoveries. it's like the finding of
Americay ou only discover it once. The age in which we live is the age in which we're discovering the basic laws of nature." Today, we
are closer than ever before to understanding the nature of the universe. Our goal in writing this book is to share some of the excitement of these
discoveries, and the new picture of reality that's rising consequently.
Cy-pr
WE LIVE IN A weird AND great universe. Its age, size, violence, and beauty require surprising imagination to appreciate. The place
we humans hold inside this vast cosmos can seem pretty insignificant. And so we attempt to seem right of it all and to see how we fit in. Some decades
ago, a well known scientist some say it was Bertrand Russell gave a public lecture on astronomy. He portrayed how the earth orbits around the
sun and how the sun, in turn, orbits around the center of a vast group of stars called our galaxy. At the end of the lecture, a little old lady at the
back of the room got up and said: "What you have told us is nonsense. The world is really a flat plate supported on the back of a giant turtle." The
scientist gave a superior smile before replying, "What is the turtle standing on?" "Youre smart, young man, smart," said the old lady. "But
its turtles all the way down."
Isitdownorjustme
majority of people nowadays could find the picture of our universe as an infinite tower of turtles rather ridiculous. But why should we think we know
better? Forget for a minute what you knowor think you knowabout space. Then gaze upward at the night sky. What could you make of all those
points of light? Are they tiny fires? It may be hard to imagine what they really are, for what they really are is far beyond our common experience. If you
are a regular stargazer, you have most likely seen an elusive light hovering near the horizon at twilight. it's a planet, Mercury, but it's nothing like our
own planet. A day on Mercury lasts for two thirds of the planets year. Its surface reaches temperatures of over 400 degrees Celsius when the sun is
out, then falls to nearly 200 degrees Celsius in the dead of night. still as different as Mercury is from our own planet, it isn't almost as hard to
imagine as a common star, which is a big furnace that burns billions of pounds of matter each second and reaches temperatures of tens of millions
of degrees at its core.
Mustat
Another thing that's hard to imagine is how far away the planets and stars really are. The ancient Chinese built stone towers so they may have a
closer look at the stars. Its natural to think the stars and planets are much closer than they really areafter all, in everyday life we have no
experience of the big distances of space. Those distances are so big that it doesnt seem right to measure them in feet or miles, the way
we measure most lengths. Instead we use the light year, which is the distance light travels in a year. In one second, a beam of light will travel
186,000 miles, so a light year is a long distance. The nearest star, other than our sun, is called Proxima Centauri aka Alpha
Centauri C , which is about four light years away. that's so far that with the fastest spaceship on the drawing boards today, a trip to it would
take about ten thousand years.
Mysitecost
Ancient people tried hard to understand the universe, but they hadnt still worked on our mathematics and science. Today we have powerful tools:
mental tools like mathematics and the scientific technique, and technological tools like computers and telescopes. With the help of these tools,
scientists pieced together lots of knowledge about space. But what do we really know about the universe, and how do we know it? Where did
the universe come from? Where is it going? Did the universe have a beginning, and if what happened before then? What is the nature of time?
Will it ever come to an end? Can we go rearward in time? Recent breakthroughs in physics, made possible in part by new technology, suggest
answers to some of these long standing questions. one day these answers may seem as evident to us as the earth orbiting the sunor perhaps
as ridiculous as a tower of turtles. Only time whatever that can be will tell.
Pingmyurl
