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Technews
@technews.tw · 2 hours

銀河系演化史翻新,誕生初期即歷經大規模「星系併吞」

銀河系演化史翻新,誕生初期即歷經大規模「星系併吞」
我們的銀河系並非一次形成,而是在漫長演化過程中,逐漸吸收其他較小的星系,才形成今天的樣貌。最新研究利用哈伯太空望遠鏡(HST)的高精度觀測資料,分析銀河系內古老的球狀星團,這些由數十萬甚至更多恆星緊密聚集而成的古老星團,就像保存銀河系早期歷史的「宇宙化石」。研究團隊比較 39 個球狀星團的年齡與化學組成後,發現其中有一群星團呈現與銀河系原生星團及先前已知的合併事件不同的特徵,顯...
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