The Japan Aerospace Exploration Agency (JAXA) is giving us Earthbound folks a chance to send a Moon message aboard the agency’s lunar orbiter Selene. But you better act fast, today’s your last chance. 

The mission is slated to launch atop a Japanese H-2A rocket this summer to study how our planet’s only natural satellite formed [image].  To commemorate the flight, JAXA has staged the SELENE “Wish upon the Moon!” Campaign, which comes with a guarantee that the orbiter “will deliver you name and message to the Moon.” JAXA is working with the Planetary Societies of Japan and the U.S. on the project.

Click here to submit the name of yourself or your cat (up to 20 English letters or 10 Japanese characters) and a short note (40 English letters or 20 Japanese characters) to let the Moon know you care.

It’s free, so don’t bother to ask for a refund in the event of a launch delay. 

The real test will be whether Selene finds any Selenites, those pesky Moon people that perturbed the protagonists of H.G. Wells’ The First Men in the Moon.