THE MESSAGE SENT TO ALIENS BY NASA

                               Most of outer space projects are done by the NASA.They have done many projects and experiments about space and most of the satellites and the space crafts are sent by NASA.NASA plays the main role in space explorations and now they are looking for some outer space life,which means aliens.From the Hubble telescope they have identified some  planets similar to the earth.Those planets are orbiting around a sun on ecliptic path.NASA did several projects to identify  outer space life but they couldn't find any information about this.So they started a new project by sending a message to aliens.


            On September 5th 1977 NASA launched Voyager 1 from Cape Canaveral Florida.Almost 4 decades later that aircraft is over 12 billion miles from home.Voyager carries a golden record containing a greeting from the people of earth to the alien life form that may someday find.On the record is collection of images and sounds.A short glimpse into the soul of their  plan  but since alien probably wouldn't  know,what to do with the photograph  record.NASA had to provide a set of instruction on the record cover but what could they say,how do they begin to communicate with a life form that evolved entirely separate from us.


                Scientists at NASA had to invent a code that anyone living in the universe might be able to decipher.So to do  this they started with what is far the most commonly found molecule in the universe.Hydrogen,the above diagrum illustrate the transition law states of hydrogen.Any space faring civilization will probably understand the properties of hydrogen enough to know that when the trnasistion happens,radiation is released  with a definite wave period,in human terms we say this period is about 0.7 nano seconds.This period is used as the basic unit of measurements for the rest of the diagrum on the cover.


                 These are the instruction on how to make the record work,assuming aliens wouldn't have record players like we do.NASA included one on the craft with needle already in place.These marking are binary code that define the speed you need to turn the record to get it  to play correctly.  When translated we get over 5.1 billion hydrogen transition  wave periods or about 3.6 seconds per rotation.At this speed the will begin to hear greetings in 55 different languages.This would be followd by music and sounds from earth like train in motion,crickets chirping,firecracker and a baby crying.


             The above section explains how image can be pieced togethr from recorded siganl.A replica of the first image on the reccording is shown here,so the viewer can verify they decoded the signal correctly.In total there are 116 images on the recor,they show solar system,our planet and ourselvs.without much to erode it in space,the gilden record is estimated to survive for a billion years travelling aimlessly through milkeyway.It's impossible to say whether Voyager ot it's twin voyager 2 will  be found by another life form

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