Your words could reach out of our solar system—no gigantic megaphone necessary. NASA is hosting a contest that will see a message from one lucky Earthling sent to Voyager 1, which is hurtling through interstellar space. Entrants are invited to submit an "uplifting" message of 60 characters or less on social media using #MessageToVoyager. Scientists will then pick their 10 favorite messages and let the public vote for one to be beamed to Voyager 1 on Sept. 5, the 40th anniversary of the probe's launch, reports Mashable. Messages will be accepted until Tuesday. Voting begins Aug. 23. (Celebrate the anniversary with a copy of the Voyager golden record.)