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Coconino Sun Article about the Discovery of Pluto
Scan of a Flagstaff newspaper, the Coconino Sun, with an article about the discovery of Pluto. The article features images of Clyde Tombaugh and V.M. Slipher alongside an account of their involvement in the search. Also included in the article is…

Pluto Not Yet Explored Stamp
Image of the 1991 postage stamp featuring an image of Pluto with the words "Not Yet Discovered." This stamp was part of a series issued by the United States Postal Service that depicted all the planets in the solar system individually.

Pluto Explored Stamp
Postage stamp created by the United States Postal Service (USPS) after the return of the New Horizons mission. The stamp reads "Pluto—Explored!" with an image of the New Horizons satellite and the enhanced image of Pluto taken during the mission.…

Screenshot of Spaceballs Pluto Joke
Screenshot from the 1987 film "Spaceballs," which features a joke about Pluto.

Photograph of Lowell Observatory's Archivist, Lauren Amundson, with Pluto the dog at Disneyland.
Photograph of Lowell Observatory's archivist, Lauren Amundson (right), with Pluto the dog in Disneyland. In a 1930 short film titled "The Picnic," Pluto first appeared with the name "Rover." He later appeared in another short film released on May 3,…

Photograph of Jim Christy holding glass slide with Charon discovery plate
Photograph of astronomer Jim Christy holding a glass plate with the discovery images of Pluto's moon, Charon. Christy had been conducting research on Pluto's orbit when he saw a distorted image of Pluto that he hypothesized was its moon. After…

A Live NASA TV Broadcast with New Horizons Team Members
Photograph of New Horizons team members during a live NASA television broadcast in 2015. Pictured left to right are Alan Stern, Hal Weaver, Will Grundy, Cathy Olkin, and John Spencer.

Annette Tombaugh having a Pluto Roll at Karma Sushi
Photograph of Clyde Tombaugh's daughter, Annette, enjoying a Pluto Roll at Karma Sushi in Flagstaff, Arizona. The sushi restaurant named this roll in celebration of the anniversary of Pluto's discovery.

Artist Rendering of the Pluto-Charon System
An artist's rendering of Pluto and its moon Charon, courtesy of the European Organisation for Astronomical Research in the Southern Hemisphere (ESO).

Audio Clip of an Interview between Dr. Will Grundy and Melissa Valenzuela Discussing New Horizons
Clip from an interview between Dr. Will Grundy and Lowell Observatory's archives intern, Melissa Valenzuela. Dr. Grundy discusses the important outcomes of the New Horizons mission, including comparative planetology and the study of other objects in…
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