Complex sentence: On August 15,1977, the Big Ear recorded its greatest success when an interesting radio signal known as the Wow! signal was received, named for the notation made by American astronomer Jerry R. Ehman.
Split into simpler sentences: On August 15,1977, the Big Ear recorded its greatest success when an interesting radio signal was received. This signal is known as the Wow! signal, so named for the notation made by American astronomer Jerry R. Ehman.