The Sco OB2 population from Gaia DR2 data

The Sco OB2 association is the nearest OB association, extending over approximately 2000 square degrees on the sky. Only its brightest and most massive members are already known...天蝎-半人马座OB2星协（Sco OB2 association）是距离地球最近的OB星协，在天球上延展约2000平方度。目前仅已知其最明亮且质量最大的成员天体。