Source: https://www.spacespeak.com/
Here is a great website that allows you to send messages to aliens using radio signals. You can click there, type a message, press send and its done! Free! Its a fun way to send messages into space. The radio signals travel at the speed of light forever. Long after you and I are gone, those signals will continue traveling every second across the universe and beyond. Think about it. Millions of alien species out there all possible recipients of your words, your thoughts, your beliefs. No, I don't get paid by them for this. I just think a lot of people out there are looking for something like this. I hope this helps you.
Scott C. Waring-Taiwan
