Here’s how it works. The U.S. Postal Service will release, on May 4, 2011, a stamp to celebrate the first spacecraft to orbit Mercury.(Image credit: Stamp: USPS; background image: NASA) ...

The 4-cent "Project Mercury" postage stamp was revealed and immediately put on sale in 305 post offices within an hour of Glenn's triumphant return to Earth at 2:43 p.m. EST (1943 GMT) on Feb. 20 ...

Anoriginal Mercury astronaut and a spacecraft set to orbit the planet Mercurywill be featured on two United States postage stamps to be released next year,according to the U.S. Postal Service.

The Town of Clinton was one of those postal centers that received the stamps in early December 1961. Remember that Glenn’s flight was supposed to take place in late December, but was delayed ...

The 29-cent stamps showed each planet being visited by a robotic probe, with Mariner 10 at Mercury. For the design of the Messenger stamp, Giancola drew inspiration from NASA photographs and images.