Pioneer plaque
plaque attached to the Pioneer 10 and Pioneer 11 spacecraft in case extraterrestrial life finds them
en-GB/ˌpaɪəˈnɪə plɑːk/
en-US/ˌpaɪəˈniɹ ˈplæk/
plaque attached to the Pioneer 10 and Pioneer 11 spacecraft in case extraterrestrial life finds them