Pioneer plaque.svg. "The Pioneer F spacecraft, destined to be the first human made object to escape from the solar system into interstellar space, carries this pictorial plaque. It is designed to show scientifically educated inhabitants of some other star system, who might intercept it millions of years from now, when Pioneer was launched, from where, and by what kind of beings.
The Pioneer plaques are a pair of gold-anodized aluminium plaques which were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message, in case either Pioneer 10 or 11 was intercepted by extraterrestrial life.
A 15-cm by 23-cm (6-in. by 9-in.) gold-anodized aluminum plate fixed to the antenna support struts of Pioneer 10 and Pioneer 11. It carries an information-rich message, devised by Carl Sagan and Frank Drake, in the event that either of the spacecraft is detected and recovered in the remote future by advanced extraterrestrials.