What is the Universe Made Of? The Case for Dark Matter and Dark Energy

          @misc{ scivideos_PIRSA:12070004,
            doi = {},
            url = {https://pirsa.org/12070004},
            author = {Burgess, Cliff},
            keywords = {Cosmology},
            language = {en},
            title = {What is the Universe Made Of? The Case for Dark Matter and Dark Energy},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2012},
            month = {jul},
            note = {PIRSA:12070004 see, \url{https://scivideos.org/pirsa/12070004}}
          }
          

Abstract

For the first time in human thought it is now
possible to observationally determine how much matter is in the Universe as a
whole. These observations strongly support the “Concordance Model” of Hot Big
Bang Cosmology, and reinforce earlier indications that ordinary matter (atoms,
nuclei and electrons) make up at present at most 4% of the total of the
Universal energy density. The big surprise was that the rest consists of *two*
kinds of unknown forms of matter: the so-called Dark Matter and Dark Energy.
This talk summarizes for non-specialists the various lines of evidence for
their existence, and some of the theoretical ideas which have been proposed to
account for their properties