Pluto’s Four Tiny Moons’ Topsy-Turvy Tumbles | Animation

Hydra, Nix, Kerberos and Styx behave like ‘spinning tops” according to SETI Institute’s Mark Showalter. Hydra – the fastest rotation – spins at dizzying 89 times per Pluto orbit. These mini-worlds look like they could each be collision-mergers of two even smaller bodies. (Full Story)