## A Brief History of Time: From the Big Bang to Black HolesBantam Books, 1988 - 198 páginas Stephen Hawking has earned a reputation as the most brilliant theoretical physicist since Einstein. In this landmark volume, Professor Hawking shares his blazing intellect with nonscientists everywhere, guiding us expertly to confront the supreme questions of the nature of time and the universe. Was there a beginning of time? Will there be an end? Is the universe infinite or does it have boundaries? From Galileo and Newton to modern astrophysics, from the breathtakingly cast to the extraordinarily tiny, Professor Hawking leads us on an exhilarating journey to distant galaxies, black holes, alternate dimensions--as close as man has ever ventured to the mind of God. From the vantage point of the wheelchair from which he has spent more than twenty years trapped by Lou Gehrig's disease, Stephen Hawking has transformed our view of the universe. Cogently explained, passionately revealed, "A Brief History of Time is the story of the ultimate quest for knowledge: the ongoing search for the tantalizing secrets at the heart of time and space. |

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**cone**whose tip is at the place and time at which the stone hit the water ( Fig . 2.3 ) . Similarly , the**light**spreading out from an event forms a three - dimensional**cone**in the four - dimensional space - time . This**cone**is called the ...Página 27

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**light cone**of P cannot be reached. 10 9 8 FIGURE 2.5 7 6 ELSEWHERE 5 FUTURE**LIGHT CONE**OF EVENT 4 3 2 1 0 TIME ( minutes ) FIGURE 2.6 EVENT AT WHICH SUN DIES THE EARTH ENTERS THE FUTURE**LIGHT CONE**OF THE DEATH OF THE SUN AFTER ABOUT 8 ...Página 28

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**light cone**of P cannot be reached by signals from P because nothing can travel faster than light . They cannot therefore be influenced by what happens at P. The absolute past of P is the region inside the past**light cone**. It is the set ...### Contenido

Our Picture of the Universe | 3 |

Space and Time | 15 |

The Expanding Universe | 35 |

Derechos de autor | |

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### Otras ediciones - Ver todas

A Brief History of Time: From the Big Bang to Black Holes Stephen Hawking,Carl Sagan Vista de fragmentos - 1990 |

### Términos y frases comunes

anthropic principle antiparticles antiquarks astronaut atoms big bang big bang singularity body boundary condition called collide complete unified theory cosmological density describe dimensions direction disorder distance early universe earth Einstein electrons emitted entropy event horizon exist finite Friedmann galaxies Galileo gamma ray grand unification energy gravitational attraction gravitational field gravitational force happen idea imaginary increase infinite inflationary model initial large number laws of science light cone light rays mass mathematical matter particles measure million million million moving Newton nucleus observe orbits partial theories particles of spin paths physicist planets position possible predictions primordial black holes protons and neutrons quantum mechanics quantum theory quarks radiation recollapse regions Roger Penrose rotating scientist space space-time speed of light string theory sum over histories symmetry temperature theorem theory of gravity theory of relativity thermodynamic arrow thousand million tions uncertainty principle universe expands velocity wavelength zero