American spaceship Explorer-1 on post stamp

Keywords:

canceled, collection, stamp, picture, communications, postage, mail, post, postmark, label, letter, mark, isolated, Poland, USA, american, Explorer1, Explorer, astronaut, spaceship, global, cockpit, flying, future, porthole, travel, rocket, moving, power, metal, energy, transport, transportation, science, astronomy, missile, cosmonaut, cosmos, progress, ship, space, spacecraft, speed, start, technology,