4 tiny, Earth-like planets found circling 2nd-closest star system to us — and could be visited by future human generations
A quartet of small, rocky exoplanets likely circle Barnard's Star, around 6 billion light-years from Earth, putting them in contention as targets of missions for future human generations.
A quartet of small, rocky exoplanets likely circle Barnard's Star, around 6 billion light-years from Earth, putting them in contention as targets of missions for future human generations.
