哈勃空间望远镜揭开银河系早期演化之谜

美国国家航天局（NASA）的哈勃空间望远镜（Hubble Space Telescope）提供了确凿证据，表明一个矮星系在银河系（Milky Way galaxy）演化的早期阶段与其发生了并合。这一发现将我们对银河系历史的认知向前推进了18亿年。

New data from NASA’s Hubble Space Telescope shows definitive evidence of a dwarf galaxy merging with the young Milky Way galaxy in the earliest phases of its evolution. This finding extends our knowledge of our galaxy’s history 1.8 billion years farther back in time than before.