New research conducted by the Max Planck Institute for Solar System Research looks into why NASA New Horizons' target Arrokoth, also nicknamed Ultima Thule, is surprisingly flat. [Meet Arrokoth: Ultima Thule, the Most Distant Object Ever Explored, Has a New Name](https://www.space.com/ultima-thule-beyond-pluto-new-name-arrokoth.html) Credit: Space.com / simulation courtesy: PMO/MPS / produced & edited by [Steve Spaleta](http://www.twitter.com/stevespaleta)