🛰️ Back in 1977, astronomers picked up a mysterious radio signal from deep space—now famously called the “Wow! signal” 📡✨. Captured by the Big Ear radio telescope at Ohio State University, it came through as a strong, narrowband emission at 1420 MHz—a frequency linked to neutral hydrogen, making it especially intriguing for the search for extraterrestrial intelligence (SETI) 🛸🔭. Astronomer Jerry Ehman was so stunned by its intensity that he scribbled “Wow!” next to the code 6EQUJ5 on the pri