In the small town of Hat Creek in Shasta County, a few hours north of the Bay Area, a radio observatory is looking for a lot more than just stars.
The sensitive receivers scan the radio spectrum spanning from 0.5 gigahertz to 11 gigahertz, a range of 10 billion channels.
"Yeah," said SETI's Senior Astronomer, Seth Shostak."The 'Wow' signal. It looked like the real deal. It really looked like the kind of thing you'd expect from some alien transmitter. But it was seen once, well, twice within one minute. Twice. And then it was never seen again. Five minutes later it wasn't seen. An hour later, not seen. Years later, not seen. Many people have done many experiments trying to find that 'wow' signal again. And well.
"We are listening for radio signals and our experiment's really simple," says Dr. Shostak."We take these 42 antennas, we point them all at some nearby star system, and we listen at multiple frequencies to see if we pick up any sort of signal." "The big difference in the way we're looking for ET today compared with the 1960s," says Dr. Shostak,"is mostly in the equipment. The equipment isn't just millions; it's billions of times better. It means that you're covering a lot of the radio dial at once, so that increases your chances of finding something."
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