Click on image to enlarge.
Pluto’s moons Nix and Hydra
Release Date: July 13, 2015
The approximate sizes of Pluto’s moons Nix and Hydra compared to Denver, Colorado. While Nix and Hydra are illustrated as circles in this diagram, mission scientists anticipate that future observations by New Horizons will show that they are irregular in shape.
Credit: Johns Hopkins University Applied Physics Laboratory/Google