Pioneer 11 Tracking-E TR cover depicting an image of the plaque that both Pioneer 10 and 11 carry with them on their space missions. The Pioneer plaques are a pair of gold-anodized aluminum plaques featuring a pictorial message, in case either Pioneer 10 or 11 is intercepted by extraterrestrial life. The plaques show the nude figures of a human male and female along with several symbols that are designed to provide information about the origin of the spacecraft.(courtesy Wikipedia).
