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银河系总质量是多少？约为太阳质量7000亿到2万亿倍
source link: https://tech.sina.com.cn/d/s/2018-09-20/doc-ifxeuwwr6235981.shtml
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新浪科技讯北京时间9月20日消息，据国外媒体报道，在远离城市灯光的荒野，抬头看天，你会见到夜空中最迷人的奇迹之一——构成银河系的明亮恒星带。我们的银河系家园广阔而美丽，并且充满着无数未解的谜团。例如，尽管天文学家努力了几十年，依然无法确定银
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