【摘要】：正我們生活的宇宙,已經(jīng)度過(guò)了138.2億年的歲月——?dú)W洲航天局3月21日宣布,他們測(cè)出了迄今為止最精確的宇宙年齡。這個(gè)數(shù)字,比之前估算的宇宙的年齡"大"了0.8億年,也就是說(shuō),宇宙比科學(xué)家原先設(shè)想的更加古老,而且,描述宇宙膨脹速率的哈勃常數(shù)變小了,這說(shuō)明宇宙的膨脹速度比原先計(jì)算的要慢。另外,科學(xué)家還重新"分配"了宇宙的物質(zhì)組成:宇宙中"正物質(zhì)"的比例由原先的4.6%上升到了4.9%。"暗物質(zhì)"的比例從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%
【分類(lèi)號(hào)】：P159
，

本文編號(hào)：2153994