-----------------------------------

Calin Pop

16 Sep 2006 11:21



-----------------------------------

G) ce-s alea structuri galactice? daca va referiti la galaxii, habar n-avem de evolutia lor. Poate stiti Dvs. mai multe... va cedez Nobelul.
Daca va referiti la clusteri de galaxii, cu atat mai putin. 
Daca va referiti la structuri observabile la diferite deplasari spre rosu (in urma in timp) atunci prezenta diverselor forme de-a lungul timpului numai BB nu arata, ci dimpotriva, duc la un Univers cu stringuri cosmice. E-adevarat ca stringurile nu evita in mod obligatoriu singularitetea initiala, dar un model cu stringuri nu e un model BB

Detailed observations of the morphology and distribution of galaxies and quasars provide strong evidence for the Big Bang. A combination of observations and theory suggest that the first quasars and galaxies formed about a billion years after the Big Bang, and since then larger structures have been forming, such as galaxy clusters and superclusters. Populations of stars have been aging and evolving, so that distant galaxies (which are observed as they were in the early universe) appear very different from nearby galaxies (observed in a more recent state). Moreover, galaxies that formed relatively recently appear markedly different from galaxies formed at similar distances but shortly after the Big Bang. These observations are strong arguments against the steady-state model. Observations of star formation, galaxy and quasar distributions, and larger structures agree well with Big Bang simulations of the formation of structure in the universe and are helping to complete details of the theory.