A Brief History of Time: From the Big Bang to Black HolesStephen 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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Página 44
The galaxies then start to move toward each other and the universe contracts . Fig . 3.2 shows how the distance between two neighboring galaxies changes as time increases . It starts at zero , increases to a maximum , and then decreases ...
The galaxies then start to move toward each other and the universe contracts . Fig . 3.2 shows how the distance between two neighboring galaxies changes as time increases . It starts at zero , increases to a maximum , and then decreases ...
Página 45
We can determine the present rate of expansion by measuring the velocities at which other galaxies are moving away from us , using the Doppler effect . This can be done very accurately . How- ever , the distances to the galaxies are not ...
We can determine the present rate of expansion by measuring the velocities at which other galaxies are moving away from us , using the Doppler effect . This can be done very accurately . How- ever , the distances to the galaxies are not ...
Página 48
In Friedmann's models , the galaxies are all moving directly away from each other - so it is not surprising that at some time in the past they were all at the same place . In the real universe , however , the galaxies are not just ...
In Friedmann's models , the galaxies are all moving directly away from each other - so it is not surprising that at some time in the past they were all at the same place . In the real universe , however , the galaxies are not just ...
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LibraryThing Review
Crítica de los usuarios - jcvogan1 - LibraryThingFirst hundred pages are excellent, but then it gets to the then current day and becomes more a standard academic ‘this is what I think’ book. Leer comentario completo
LibraryThing Review
Crítica de los usuarios - benkaboo - LibraryThingSummary: Deep dive summary of the world of physics over the last 500 odd years. Things I liked: Objective: Trying to break heavy duty science into the language and ideas that regular folk can ... Leer comentario completo
Otras ediciones - Ver todas
A Brief History of Time: From the Big Bang to Black Holes Stephen Hawking,Carl Sagan Vista de fragmentos - 1988 |
Términos y frases comunes
able according appear arrow atoms attraction beginning believed big bang black hole body boundary called caused collapse complete contracting density describe developed dimensions direction disorder distance early earth effect Einstein electrons emitted energy event event horizon example exist expanding explain fact fall field FIGURE force galaxies gravitational collapse gravity happen histories idea increase infinite initial known later laws less light limit look mass matter means measure million million million moving neutron Newton objects observe orbits particles past paths phase planets position possible predictions principle probably quantum mechanics quarks question radiation rays reason regions relativity result rotating seems showed single singularity space space-time speed stars started string suggested surface temperature theory thought uncertainty unified theory universe waves weak zero