搜索结果: 1-4 共查到“星系与宇宙学 age”相关记录4条 . 查询时间(0.105 秒)
New view of nature's oldest light adds fresh twist to debate over universe's age（图）
New view nature oldest light adds fresh twist debate over universe's age
2020/7/31
From a mountain high in Chile's Atacama Desert, astronomers at the U.S. National Science Foundation's Atacama Cosmology Telescope (ACT) have taken a fresh look at the oldest light in th...
Using data from the Two Micron All Sky Survey, we identify a population of infrared carbon stars with J-KS ≥ 2 in the Milky Way. These stars are shown to trace the stellar bar previously identified in...
The age of the galaxy from thorium cosmochronometry。
The cosmological, astrophysical, and nucleocosmochronological
methods for estimating the age of the universe and the corresponding
uncertainties are comparatively studied in the present paper.We are...