NGC 1893 stars LSR velocities
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OB associations are the prevailing star-forming sites in the Galaxy. Up to now, the process of how OB associations were formed remained a mystery. A possible process is...
OB星协（OB associations）是银河系中主流的恒星形成场所。迄今为止，OB星协的形成过程仍是一个未解之谜。一种可能的形成过程为……
