circumnuclear
1. What intrigues many astronomers, however, is the circumnuclear ring around the galaxy center visible just outside the central bar.
是什么激起了众多天文学家的兴趣呢,那就是围绕在星系中央棒外的光环。
2. circumnuclear star-formation
核周产星
3. circumnuclear star-forming ring
核周产星环