Discoveries about the planets and our most famous dwarf planet, Pluto, are highlighted in a series of new U.S. commemorative postage stamps.
In May, the U.S. Postal Service issued “Pluto-Explored!” a four-stamp souvenir pane of two different stamps, one showing an artist’s view of the NASA New Horizons spacecraft and one showing the enhanced color image of Pluto taken by the spacecraft near its closest approach to Pluto in July 2015.
Discoveries about the planets and our most famous dwarf planet, Pluto, are highlighted in a series of new U.S. commemorative postage stamps.