Are you up to a bit of a technical challenge to purposely signal to one of NASA’s space probes?
NASA’s Juno spacecraft will fly past Earth on October 9, 2013 to receive a gravity assist from our planet, putting it on course for Jupiter. To celebrate this event, the Juno mission is inviting amateur radio operators around the world to say “HI” to Juno in a coordinated Morse Code message. Juno’s radio & plasma wave experiment, called Waves, should be able to detect the message if enough people participate. So please join in, and help spread the word to fellow amateur radio enthusiasts!
Don’t forget to check out the technical requirements of the experiment, as they are non-trivial.