Word: billion-channel
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...shortcomings of Project Sentinel failed to deter the determined Horowitz and team. They followed up the project with Megachannel Extra-Terrestrial Assay (META) in 1985, and then with Billion-channel ExtraTerrestrial Assay (BETA...
Each day, as the Earth turns, the BETA (for Billion-channel Extra-Terrestrial Assay) telescope sweeps a circular swath through the heavens, elevated at a slightly different fixed angle from the horizon with each successive turn. During each circuit it captures radio waves reaching Earth at frequencies between 1400 and 1720 megahertz--a broad but relatively "quiet" region of the radio spectrum. "In the 1960s we were looking in a few niches and hoping the extraterrestrials had put their jewels there," says astronomer Frank Drake, who launched the first SETI project in 1960. "They didn't. Now we are doing...
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