1·Binary star systems are common in the galaxy.
在星系中双星系统是很常见的。
2·At the nebula's center is a young binary star system that surely powers the nebula but does not, as yet, explain its colors.
星云的中心是一个年轻的双星系统，星云的能量确定来源于此，但还不能解释星云的颜色。
3·The binary star system consists of two white dwarfs—the burnt-out cores of sunlike stars.
该双星系统由两颗白矮星组成——所谓白矮星既是像太阳那样的恒星燃烧殆尽后遗留下来的核心。
4·Globular cluster 47 Tuc is also home to exotic X-ray binary star systems.
球状星团47 Tuc中也存在一些奇怪的紫外双星系统。
5·Spending hours going through the images taken since 2002, he and his colleagues found light variations that suggested v1309 was originally a contact binary star.
这位科学家花费了大量的时间来查阅望远镜自2002年起所拍摄到的图像，他与同事发现，从v1309所发出的亮光的变化上来看，它原属于相接双星。