What the Universe is Made Of and How We Know It

Details What the Universe is Made Of and How We Know It What the Universe is Made Of and How We Know It

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..apr.p8004t&link_type=abstract

American Physical Society, April Meeting, April 29-May 2, 2000 Long Beach, CA, abstract #P8.004

Physics

Scientific paper

We now have a pretty good idea about what the Universe is made of: 0.5% stars; 5% stuff made of the elements in the periodic table; 30% exotic dark matter; and 65% dark energy, for a grand total equalling the critical density. The exotic dark matter,which is what holds everything together in the Universe (galaxies,the great clusters of galaxies, and so on), is thought to be elementary particles left over from the earliest moments of creation. The dark energy is causing the Universe to speed up, rather than slow down, and we don't have a clue as to what it is! I will discuss the scientific evidence for this accounting as well as plans to figure out which particles comprise the exotic dark and what the dark energy is.

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