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Message: <blockquote data-quote="tharinda07" data-source="post: 3660034" data-attributes="member: 21844"><img src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Flatness_problem_density_graph.svg/532px-Flatness_problem_density_graph.svg.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> The relative density Ω against <a href="http://en.wikipedia.org/wiki/Cosmic_time" target="_blank">cosmic time</a> t (neither axis to scale). Each curve represents a possible universe: note that Ω diverges rapidly from 1. The blue curve is a universe similar to our own, which at the present time (right of the graph) has a small |Ω − 1| and therefore must have begun with Ω very close to 1 indeed. The red curve is a hypothetical different universe in which the initial value of Ω differed slightly too much from 1: by the present day it has diverged massively and would not be able to support galaxies, stars or planets.</blockquote>

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