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DTSTAMP:20260416T191225
DTSTART:20130322T113000
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TRANSP:OPAQUE
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URL:https://murmitoyen.com/events/vanille/udem/detail/173469
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:THE COSMIC JOURNEY OF STARLIGHT: WHERE HAVE ALL THE PHOTONS GONE?
DESCRIPTION:Eli Dwek\, Adjunct Professor\, Astronomy Department\, Universit
 y of Maryland\, College ParkRésumé/abstract:In an infinite and static un
 iverse populated by stars\, the night sky would be infinitely bright. The 
 fact that the night sky is dark is known as Olber's 'paradox'. Its solutio
 n lies in the two faulty assumptions that the universe is infinite and sta
 tic.The absolute brightness of the night sky from optical to far infrared 
 wavelengths contains therefore important information on the scale and evol
 ution of the star-filled universe.In this talk I will describe the quest f
 or determining the brightness of the sky and the cosmological implications
 .Cette conférence s'adresse à tous\, y compris les professeurs\, les che
 rcheurs et les étudiants des trois cycles.Le café est servi à partir de
  11h20.Cette conférence est présentée par le Département de physique d
 e l'Université de Montréal.
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