Complex sentence: It is expected to be the first spacecraft to flyby and study Pluto and its moons, Charon, Nix, Hydra and S/2011 P 1, with an estimated arrival date at the Pluto-Charon system of July 14,2015.
Split into simpler sentences: It is expected to be the first spacecraft to flyby and study Pluto and its moons, Charon, Nix, Hydra and S/2011 P 1. Its estimated arrival date at the Pluto-Charon system is July 14,2015.