# This is your Astronomy Tonight podcast.

Good evening, stargazers! Today we're celebrating November 24th – a date that marks one of the most delightfully weird and scientifically significant discoveries in astronomical history!

On November 24th, 1974, humanity received what might be the most important cosmic "hello" we've ever sent out – the Arecibo Message was transmitted into space! Scientists at Cornell University, led by the legendary Carl Sagan and Frank Drake, took over the massive Arecibo Observatory radio telescope in Puerto Rico and beamed a powerful signal toward the globular cluster M13, located about 25,000 light-years away.

Here's where it gets fun: this wasn't just any random signal. The message was a carefully constructed blueprint of humanity – literally! It contained 1,679 binary digits that, when arranged properly, formed a pictorial representation of our DNA structure, mathematical symbols, and even a crude map of our solar system. We essentially said to the universe, "Hey, here we are! We're made of DNA, we do math, and we live near this yellow star!"

The message traveled at light speed – the fastest speed anything can travel – yet it won't reach M13 for another 25,000 years. So somewhere around the year 27,000, our greeting card might finally arrive. Talk about playing the long game with cosmic pen pals!

**If you enjoyed learning about humanity's bold attempt at intergalactic communication, please subscribe to the Astronomy Tonight podcast! For more detailed information about tonight's skies and cosmic events, visit Quiet Please dot AI. Thank you for listening to another Quiet Please Production!**

This content was created in partnership and with the help of Artificial Intelligence AI