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Why has SETI detected no signals from extra-terrestrial life?
SETI Finds No Alien Signals from Exoplanets
http://www.space.com/19703-intellige...nets-seti.html
http://www.space.com/19703-intellige...nets-seti.html
For this search, a team targeted 104 stars with planets discovered by the Kepler Telescope. Still nothing.
Intelligent alien life is likely relatively rare throughout our Milky Way galaxy, with fewer than one in a million solar systems harboring civilizations advanced enough to send out radio signals, a new study reports.
"No signals of extraterrestrial origin were found," the researchers conclude in the study, which has been accepted for publication in The Astrophysical Journal.
The team selected 86 stars using data from NASA's planet-hunting Kepler space telescope, and also observed 19 stars that serendipitously fell within range as they searched the primary targets. (One planet candidate turned out to be a false positive, reducing the total number of targets to 104.)
The researchers were working with the catalog of Kepler planetary candidates, which at the time included 1,235 possible exoplanets. (That number is now up to 2,740, with 105 of them confirmed to date.)
Intelligent alien life is likely relatively rare throughout our Milky Way galaxy, with fewer than one in a million solar systems harboring civilizations advanced enough to send out radio signals, a new study reports.
"No signals of extraterrestrial origin were found," the researchers conclude in the study, which has been accepted for publication in The Astrophysical Journal.
The team selected 86 stars using data from NASA's planet-hunting Kepler space telescope, and also observed 19 stars that serendipitously fell within range as they searched the primary targets. (One planet candidate turned out to be a false positive, reducing the total number of targets to 104.)
The researchers were working with the catalog of Kepler planetary candidates, which at the time included 1,235 possible exoplanets. (That number is now up to 2,740, with 105 of them confirmed to date.)
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