HII region candidates in the OSC spiral arm
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The Outer Scutum-Centaurus (OSC) spiral arm is the most distant molecular spiral arm in the Milky Way, but until recently little was known about this structure. Discovered by...
外盾牌-半人马座旋臂（Outer Scutum-Centaurus, OSC）是银河系中最遥远的分子旋臂，但直至近期，人类对该结构的认知仍十分有限。该旋臂由……首次发现
