#5077S- (47¢) Pluto Explored - Set of 2

Pluto was discovered in 1930 and quickly lauded as the ninth planet in our solar system. Its planetary status was later questioned when it was found to be much smaller than expected. In 2006, the International Astronomical Union redefined the term planet to exclude dwarf planets such as Pluto. Many planetary astronomers still consider Pluto to be a planet. Scott 5077-78 Pluto Explored
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#5077S- (47¢) Pluto Explored - Set of 2
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