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astroengine writes "Using data extrapolated from the early Kepler observations of 1,235 candidate exoplanets, mission scientists have placed an estimate on the number of alien worlds there are in our galaxy. There are thought to be 50 billion exoplanets, 500 million of which are probably orbiting within their stars' habitable zones." Link to Original Source
[Crash programs] fail because they are based on the theory that, with nine
women pregnant, you can get a baby a month.
-- Wernher von Braun