We also describe the basic principle of white dwarf cosmochronology and its application in defining the age of the Galactic disk, globular clusters, open clusters and Galactic halo.

介绍了白矮星宇宙纪年学研究的基本原理及在银盘、球星团、疏散星团以及银晕年龄确定方面的应用。

If the incoming projectile were a white dwarf—a superdense star that packs the mass of the sun into a body a hundredth the size—the residents of Earth would be treated to quite a fireworks show.

果接近的天体是颗白矮星（whitedwarfstar，种超密恒星，质量约等同于太，体积却不到太的百万分之），那麽地球上的居民将可以看到场壮丽的烟火秀。