000			01459nam a22002177a 4500
999			_c84835 _d84835
008			160714b xxu||||| |||| 00| 0 eng d
020			_a9780195642117
082			_bHaw/Pen _a530.11
100			_aHawking, Stephen
245			_aThe Nature of Space and Time
260			_aDelhi _bOxford University Press _c1997
300			_aix; 141p. _c9x6
520			_aEinstein said that the most incomprehensible thing about the universe is that it is comprehensible. But was he right? Can the quantum theory of fields and Einstein's general theory of relativity, the two most accurate and successful theories in all of physics, be united into a single quantum theory of gravity? Can quantum and cosmos ever be combined? In The Nature of Space and Time, two of the world's most famous physicists-Stephen Hawking (A Brief History of Time) and Roger Penrose (The Road to Reality)-debate these questions. The authors outline how their positions have further diverged on a number of key issues, including the spatial geometry of the universe, inflationary versus cyclic theories of the cosmos, and the black-hole information-loss paradox. Though much progress has been made, Hawking and Penrose stress that physicists still have further to go in their quest for a quantum theory of gravity.
546			_aENG
650			_aSpace and time
650			_aQuantum theory
650			_aCosmology
650			_aAstrophysics
700			_aPenrose, Roger
942			_cBK