compact star

例句：

1. 1.This compact star is located at the center of our galaxy.
   这个紧凑星位于我们星系的中心。
2. 2. The compact star has a diameter of only 100 light-years.
   这个紧凑星的直径只有100光年。
3. 3.Compact stars are often found in clusters of galaxies, where they can be studied in greater detail.
   紧凑星通常存在于星系群中，可以更详细地研究它们。