138.2亿年:最精确的宇宙年龄
发布时间：2018-07-29 20:56
【摘要】：正我们生活的宇宙,已经度过了138.2亿年的岁月——欧洲航天局3月21日宣布,他们测出了迄今为止最精确的宇宙年龄。这个数字,比之前估算的宇宙的年龄"大"了0.8亿年,也就是说,宇宙比科学家原先设想的更加古老,而且,描述宇宙膨胀速率的哈勃常数变小了,这说明宇宙的膨胀速度比原先计算的要慢。另外,科学家还重新"分配"了宇宙的物质组成:宇宙中"正物质"的比例由原先的4.6%上升到了4.9%。"暗物质"的比例从24%上升
[Abstract]:We live in a universe that has passed 13.82 billion years-the European Space Agency announced on March 21 that it has measured the most accurate age of the universe to date. This number is "older" than the previous estimate of the age of the universe, that is, the universe is older than scientists originally thought, and the Hubble constant, which describes the rate of expansion of the universe, has become smaller. This shows that the expansion rate of the universe is slower than originally calculated. In addition, scientists have redistributed the composition of matter in the universe: the proportion of "positive matter" in the universe has risen from 4.6 percent to 4.9 percent. " "Dark matter" increased from 24%
【分类号】：P159
，
本文编号：2153994
[Abstract]:We live in a universe that has passed 13.82 billion years-the European Space Agency announced on March 21 that it has measured the most accurate age of the universe to date. This number is "older" than the previous estimate of the age of the universe, that is, the universe is older than scientists originally thought, and the Hubble constant, which describes the rate of expansion of the universe, has become smaller. This shows that the expansion rate of the universe is slower than originally calculated. In addition, scientists have redistributed the composition of matter in the universe: the proportion of "positive matter" in the universe has risen from 4.6 percent to 4.9 percent. " "Dark matter" increased from 24%
【分类号】：P159
，
本文编号：2153994
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