2005/04/26 | 奥米伽[Omega]
类别(¤〖天文〗) | 评论(0) | 阅读(27) | 发表于 14:22
is the ratio of the density of the universe to the critical density needed to close the universe,
(1)

Current measurements indicate that , and it is believed to lie between 0.1 to 10. As time goes on, an beginning near 1 becomes further away. Only in a flat universe does it remain 1.
(2)

In the friedmann-lemaître cosmological model,
(3)

(4)
0

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