The Wow! signal was a signal believed to be extraterrestrial in origin, discovered by astronomer Jerry Ehman on August 15, 1977 while working on a SETI project. While using the Ohio State University's Big Ear radio telescope, Ehman noticed a string code printout "6EQUJ5" was signified as a signal source artificially created from outside of the solar system and he wrote the word, "WOW!" beside it. The signal has never been heard from again, and the source has never been identified. Some astronomers have stated that this signal is the "best evidence" of extraterrestrial intelligence. Skeptics say it was interference from a terrestrial source modified by meteorlogical phenomena.