1950s-70s USA and Russia philatelic covers that are related to the early satellites development, manned and unmanned spaceflights to the moon.
1970-11-10 USSR Luna 17/Lunokhod 1
Luna-17 landed on the Moon on November 15, 1970. The robotic rover, Lunokhod-1 rolled off the landing platform to explore the surface of the Moon for about a month. Two cycloramic cameras on either side of the rover were oriented for 180° horizontal panoramas (500 × 3000 pixels). These panoramas are sometimes geometrically warped to correct for the 15° tilt of the camera.