In 1930, amateur astronomer Clyde Tombaugh discovered Pluto using a telescope, photographic plates of the solar system, and a tool called a blink comparator. You can see a blink comparator and Pluto discovery plate on display in the "Kenneth C. Griffin Exploring the Planets Gallery" at the Museum in DC. This video series is made possible by the generous support of Lockheed Martin. | National Air and Space Museum, Smithsonian Institution

Where were you when New Horizons beamed back those first close-up views of Pluto? The historic day-long encounter with a dwarf planet was decades in the making… and well worth the wait! | Space 360

Pluto has a thin atmosphere with a blue tint. Find out what else makes the "King of the Kuiper Belt" interesting. Stream "The Planets: Ice Worlds" online or on the @PBS app now: https://to.pbs.org/2YztewN | NOVA l PBS

Ever wondered what makes Pluto so unique? From the unexpected story behind its name to just how cold it really is on its surface, these five facts about this distant planet will surprise you. | National Geographic