In the 1970s, NASA launched its Voyager probes into space and sent greetings and core information about humanity on its journey with the "Golden Record". But what our "space colleagues" had forgotten was: ice hockey. DEG corrected this mistake by NASA with a tongue-in-cheek PR mission, sending greetings into space via radio module.
Launch and Recovery of a stratospheric balloon
Development of a radio module for the 'Alien-Message'