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Do you think its possible to find aliens in your lifetime The chances that an extraterrestrial civilization would actually come to the Earth are slim However if they did the best way to find extraterrestrial life is not by space exploration but by electronic signals Signals can carry words numbers and pictures cheaply and at the speed of light The amount of time and energy required for the travel would be enormous The amount of energy required to accelerate a spacecraft weighing several thousand tons to a speed even a moderate fraction of the speed of light would be billions of times more than the energy needed to send out a radio beacon Big Ear Radio Observatory 4 Therefore its more likely that they would communicate instead thats if there are intelligent beings out there who want to communicate with us Life Beyond Earth Today we have the means to broadcast messages to the planets and stars but is anyone out there listening If we are leaking radio messages into space the inhabitants of other planets if they exist might be doing the same thing Large radio telescopes on Earth could detect such radio leaks from civilizations in nearby star systems as well as stronger signals dispatched from planets thousands of light years away Boyle 2 The idea of searching for extraterrestrial life has been dreamed of through the ages but the methodology began in 1959 when two physicists from Cornell stated that microwave radio waves could be used for interstellar communication 2The first signal was sent from the 1000-foot Observatory in Puerto Rico on Nov 16 1974 during a ceremony celebrating an upgrade of the radio telescope The signal was sent out toward M13 a globular cluster comprising some 300000 stars about 21000 light years from Earth Astronomers figured the focused 50000-watt signal would be strong enough to be picked up by an antenna somewhere in that cluster but ironically the normal rotation of
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