Is Sirius a triple star?

Sirius has been discovered as double more than 130 years ago. From the beginning of our century up to now, observational as well as physical and dynamical indications lead to...天狼星（Sirius）早在一百三十余年前就被发现为双星系统。自本世纪初至今，观测、物理以及动力学相关的各类迹象均指向……