: You should read up on Isaac Azimov(I think that : is spelled right). He is one of the most respected : astronomers today. He wrote a book entitled Alpha : Centauri, inwhich he suggested that not only could : a planetary sysyem exist within the gravitational : forces of the two main stars, a life sustaining : planet may exist there as well. The idiot who : expressed his view of the system as three closely : nit stars should be ignored. The third star is : a white dwarf, which is located at a position that : it's gravitational force is negligable to either star. : Alpha Centuari 1 is a star much like our sun, and Alpha : Centuari 2 is a star slightly smaller, a K1, star : also capable of sustaining life; however less likely. : No planet beyond Jupiter's orbit could exist in the : Alpha Centuri 1 system because of the orbit of Alpha : Centuari 2; however, a planet with the orbit of earth : would feel negligable gravitational pull. It is : possible that a life sustaining planet may exist : within the orbits of Alpha Centauri 1 or Alpha : Centauri 2. : : the gravitational pull of Alpha