核宇宙編年學
核宇宙編年學，也稱為宇宙編年學，是相對來說使用較新的技術來確定天文物理物件和事件的時間尺度。這種技術使用重放射性核種的豐度計算天文物件形成的年齡，類似於地質年代學領域內時髦的岩石定年。
核宇宙編年學已經成功的使用計算出太陽的年齡（45.7±0.2億年）和銀河薄盤面的年齡（(8.8±1.8)×109 y），以及其它的。它也曾用來估計銀河系本身的年齡，例如最近對银晕中凱雷爾星(Cayrel's Star)所做的研究。精確度的限制因素來自被觀測天體的暗弱程度，更重要的或許是，參予r-過程元素的原始豐度不確定性。
參考資料與延伸讀物
- Bahcall et al. (1995, Reviews of Modern Physics 67, 781)
- del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology I. Determination of Th/Eu abundance ratios." Astronomy & Astrophysics, 434, (2005) 275.
- del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology II. Chronological analysis." Astronomy & Astrophysics, 434, (2005) 301.
- del Peloso et al., "The age of the Galactic thin disk from Th/Eu nucleocosmochronology III. Extended sample." Astronomy & Astrophysics, 440, (2005) 1153.
- ESO Press Release 02/01: "First Reading of a Basic Cosmic Chronometer with UVES and the VLT." (Accessed 3/8/06)
- Hill et al., "First Stars. I. The extreme r-element rich, iron-poor halo giant CS 31082-001" Astronomy & Astrophysics, 387, (2002) 560-579. (Accessed 3/8/06) （页面存档备份，存于）
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