About 11 light-years away, Ross 128 b is closer to the solar system than any known exoplanet save Proxima b. First there was Proxima b, the Earth-sized planet orbiting the closest star to us, Proxima Centauri. Then came the seven Earth-sized worlds orbiting TRAPPIST-1, a star 39 light-years away, three of which are in the habitable zone. Now we welcome a new tantalizing exoplanet to the group, the second closest we know of, also Earth-sized and temperate, orbiting a calm red dwarf star: Ross 128 b. Ross 128 is an old, inactive red dwarf star that sits 11 light-years away....