(U.S. Postal Service)

Just days before the final launch of the Space Shuttle Endeavour, postal and NASA officials will unveil images honoring former astronaut Alan Shepard, who piloted the first U.S. manned space flight on May 5, 1961. The other image commemorates the Messenger unmanned spacecraft currently orbiting the planet Mercury.

(U.S. Postal Service)

In recent weeks, USPS has unveiled stamps honoring the 150th anniversary of the Civil War and Latin music stars, and admitted it’s using a replica of the Statue of Liberty on a stamp honoring the New York City landmark.

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This post has been updated since it was first published.