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Outdated 'Pluto: Not Yet Explored' stamp takes spotlight as most traveled postage
GeekWire Pluto stamp canceled The 1991 stamp that served as the rallying cry for the New Horizons Mission to Pluto is “updated” by members of the New Horizons science team on July 14, 2015, the day the spacecraft reached Pluto. (Credit: Bill Ingalls / NASA). 'Stowaway' Pluto stamp earns Guinness World Record for farthest distance Pluto stamp aboard NASA's New Horizons probe sets Guinness World Record Spacefaring Stamp Sets World Record |
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