The Secrets of NeptuneHardcover, 1 August 2015

We know that Neptune takes 165 years to go around the Sun, but it still has secrets! It is so far away that humans have only sent one spacecraft to visit our distant neighbor. Learn about Neptune's discovery, what it would be like to visit the ice giant, and what scientists still want to know. Vivid photos, scientist spotlights, and sidebars help unlock the secrets of Neptune.