银河系年龄
- 网络Galactic Age;age of the Galaxy
银河系年龄-
简要介绍了核纪年法确定银河系年龄的原理，回顾了恒星中Th和U的观测研究，其中着重介绍了极贫金属星的研究。
We first briefly introduce the principle of this approach , and then review the history of Th and U abundance study in stars , with emphasis on the extremely metal-poor halo stars .
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作为与核纪年法的比较，简单介绍了确定银河系年龄的其他方法。
As comparison , other methods of dating the Galaxy are briefly introduced .
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确定银河系的年龄是现代天体物理学的一项基本任务。
The dating of the Galaxy is a basic task in modern astrophysics .