Far, far past Pluto, the most distant object humanity has ever visited, there’s a tiny world fainter than any seen in that part of our solar system. Its dark orbit reaches a billion miles beyond the former ninth planet. But 2014 MU69, as it’s labeled by astronomers, is just a few dozen miles across — too scant to be spherical.
There’s nothing particularly special about it. Thousands of similarly mysterious and icy worlds lurk in these celestial suburbs. Yet it’s precisely its banality tha