Also known as nuclear cosmochronology
Nucleocosmochronology, or nuclear cosmochronology, is a technique used to determine timescales for astrophysical objects and events based on observed ratios of radioactive heavy elements and their decay products. It is similar in many respects to radiometric dating, in which trace radioactive impurities were selectively incorporated into materials when they were formed.
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。
Abstract from DBpedia / Wikipedia · CC BY-SA
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).