New Horizons Principal Investigator Alan Stern celebrates a Guinness World Record certificate on July 19 at U.S. Postal Service Headquarters in Washington, D.C. (Credit: Dan Afzal, U.S. Postal Service)

WASHINGTON (USPS PR) — A 1991 Pluto: Not Yet Explored stamp traveled more than 3 billion miles on a spacecraft to the dwarf planet has earned the Guiness World Records achievement for the farthest distance traveled by a postage stamp. The stamp also served as NASA’s rallying cry to set the record straight for exploring Pluto.

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Credit: USPS

WASHINGTON (USPS PR) — In 2006, NASA placed a 29-cent 1991 Pluto: Not Yet Explored stamp in the New Horizons spacecraft. In 2015 the spacecraft carried the stamp on its history-making mission to Pluto and beyond.

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