Add Yahoo as a preferred source to see more of our stories on Google. Lasers could be used to propel tiny spacecraft toward Alpha Centauri, scientists suggest. | Credit: Artist's impression by Michel ...

Just over four light-years away, the Alpha Centauri system holds the closest worlds beyond our own that might support life.

Alpha Centauri, the nearest star system to the sun, is probably shedding comets and asteroids into our solar system — and even producing a few meteors in our sky. Located just 4.3 light-years from ...