YSOs on HII complex Sh2-252
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The optically bright, extended HII region Sh2-252 is a part of the Gemini OB1 association. This region is mainly composed of two small clusters NGC 2175s and Teu 136 and four...
光学明亮的延展电离氢区（HII region）Sh2-252隶属于双子座OB1星协。该区域主要由NGC 2175s、Teu 136两个小星团及四个……
