The giant dish began this week pointing toward each of the 86 planets -- culled from a list of 1,235 possible planets identified by NASA's Kepler space telescope -- and will gather 24 hours of data on each one.
"It's not absolutely certain that all of these stars have habitable planetary systems, but they're very good places to look for ET," said University of California at Berkeley graduate student Andrew Siemion.
The mission is part of the SETI project, which stands for Search for Extra Terrestrial Intelligence, launched in the mid 1980s.
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