000			01607nam a2200253Ia 4500
008			131122s9999 xx 000 0 und d
020			_a9.79E+12
040			_aISI KOLKATA
041			_aEnglish
082			_a523
100			_aOverduin James M
245			_aLight/dark Universe:light from galaxies,dark matter and dark energy _cJames M Overduin
260			_bWorld Scientific _c2008
300			_a236p
520			_aTo the eyes of the average person and the trained scientist, the night sky is dark, even though the universe is populated by myriads of bright galaxies. Why this happens is a question commonly called Olbers' Paradox, and dates from at least 1823. How dark is the night sky is a question which preoccupies astrophysicists at the present. The answer to both questions tells us about the origin of the universe and the nature of its contents ? luminous galaxies like the Milky Way, plus the dark matter between them and the mysterious dark energy which appears to be pushing everything apart. In this book, the fascinating history of Olbers' Paradox is reviewed, and the intricate physics of the light/dark universe is examined in detail. The fact that the night sky is dark (a basic astronomical observation that anybody can make) turns out to be connected with the finite age of the universe, thereby
650			_aCosmology
650			_aDark energy -Astronomy
650			_aDark matter -Astronomy
650			_aGalaxies --Spectra
650			_aOlbersh paradox
700			_aWesson Paul S
856			_uhttp://repository.worldscinet.com/9789812834423.html
942			_cEB
999			_c112148 _d112148