Five Weeks to Pluto: The Strange Discovery of Planet X and a World Like No Other (Part 1)

Artist’s concept of NASA’s New Horizons spacecraft during closest approach to Pluto on July 14. Image Credit: Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute (JHUAPL/SwRI)

In the dark, outer reaches of the Sun’s realm lies a world unlike any other. Discovered in the spring of 1930, Pluto—named by an Oxford schoolgirl, who was [...]