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银河系的银盘为什么是翘曲的？ episode artwork

EPISODE · Mar 24, 2020 · 6 MIN

银河系的银盘为什么是翘曲的？

from 天文随心听｜讲述宇宙与人的故事

多年以来，天文学家一直想弄明白我们的银河系（Milky Way）为什么是翘曲状的。来自欧洲空间局（European Space Agency，ESA）的巡天观测卫星盖亚（Gaia）的数据表明，这种扭曲可能源于另一个较小星系的碰撞，并且这一碰撞正在进行，碰撞产生的冲击通过银盘（galactic disc）传播到银河系边缘，就像往水中扔进石块会荡起涟漪一样。

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