RT @PhysicsWorld: Earth-mass planet orbits Proxima Centauri & could have surface-water, say @Pale_red_dot ow.ly/RLRE303y0vv https://t.co/u9CSjBbkkO
RT @PhysicsWorld: Earth-mass planet orbits Proxima Centauri & could have surface-water, say @Pale_red_dot ow.ly/RLRE303y0vv https://t.co/u9CSjBbkkO