摘要
宇宙是膨胀的还是坍缩的,或者宇宙既不膨胀也不坍缩,这种命运完全取决于暗物质对宇宙物质密度的贡献。
The fate of the universe,including expansion,collapse,and neither expansion nor collapse,is determined absolutely by the contribution of dark matter to the density of cosmic matter.
关键词
宇宙膨胀
宇宙坍缩
暗物质
物质密度
expansion of the universe
collapse of the universe
dark matter
matter density
