Voyager spacecraft

"We cast this message into the cosmos ... Of the 200 billion stars in the Milky Way galaxy, some - - perhaps many -- may have inhabited planets and space faring civilizations. If one such civilization intercepts Voyager and can understand the recorded contents, here is our message: We are trying to survive our time so we may live into yours. We hope some day, having solved the problems we face, to join a community of Galactic Civilizations. This record represents our hope and our determination and our goodwill in a vast and awesome universe."

President Jimmy Carter's message sent aboard the two NASA's Voyager spacecrafts in 1977.

                                                                                                             Credit: NASA/JPL

                                  Voyager - The Interstellar Mission

                                  Wikipedia - Voyager program