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| Description: Evolution of Density For approximately 30,000 years after the Big Bang, the gravitational effects from photons (ρrad, shown in red) exceeded the attraction of all the matter in the universe (ρm, shown in blue). This early period is said to have been radiation- dominated. Later, however, continued expansion of the universe caused ρrad to become less than ρm, at which time the universe became matter-dominated. Picture Stats: Views: 734 Filesize: 128.77kB Height: 900 Width: 906 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18786 |