Fact on aliens

                 Unknown friends 

                          Aliens 

  Start with the number of stars in our              galaxy, b which is conservatively estimated       at 100 billion, though is often cited as three times that.  Of those 100 billion from 20% to 50%  probably harbor  planetary systems—  an estimate that becomes more and more reliable as the Kepler Space Telescope and various ground-based observatories detect  increasing numbers ofexoplanets.

  Astronomers looking for alien signals            have examined only a few thousand star
systems so far. But as SETI Institute senior astronomer Seth  Shostak has noted, the rate at whichresearcher are able to process the  massive amounts of data that radio telescopes receive doubles approximately every 18 months to two years, meaning it grows by a     factor of ten every six years or so.

        The mere existence of intelligent life forms tells us nothing, however, unless they have the ability to make themselves known—  which means to manipulate radio wave and other forms of electromagnetic signaling. Drake estimates that from 10% to    20% of the smart civilizations would clear that bar.

                    Waiting for my friends                                                                                   aliens.......