What is the Pioneer Plaque?
The Pioneer Plaque is a metal plate designed to provide information about humanity and Earth to any extraterrestrial civilization that might encounter the Pioneer 10 and Pioneer 11 spacecraft. It was launched in 1972 and 1973, respectively, as part of NASA's Pioneer missions. The aim of the plaque is to convey a basic understanding of human beings, their location and their achievements, serving as a sort of interstellar "time capsule" for potential alien encounters. Learn more on Wikipedia.