superdense

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.

如果接近天体是一颗白矮星（whitedwarfstar，一种超密恒星，质量约等同于，但其体积却不到百万分之一），麽地球上可以看到一场壮丽烟火秀。