Write a message, draw a picture the way the Arecibo team did in 1974, pick a real star, and watch your words cross the gap at the speed of light.
Words become bits. The picture grid is 23 × 73 because 1,679 cells can only be split into those two primes, which hints to a reader how to unfold it.
Click or drag to light cells. The sample counts 1 to 10 in binary, then draws a person.
Real stars. The map plots each one by its right ascension around the circle and by distance outward on a log scale, with the Sun at the center.
Tell us the day you were born and we'll find the constellation the Sun stood in front of that day, and real star systems in that direction. Your birthday stays on this device.
No year needed. Nothing you pick here is saved or sent.
Every message is still moving. Yours are listed first, then real historical transmissions.
What people on Earth are saying, newest first. Messages pass a filter, and some wait for a person to review them.
Tuning in to the public log…