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The alien is to the Earth outside the wisdom life general designation. The ancient and moderns in China and abroad have had about “the alien” the imagination, also has many doubtful “the alien” in various countries' history book the strange record, but the nowadays humanity is also unable to determine that outside whether to have the star life, even is “the alien” existence. the 1977 year on September 5 launches the traveller 1st outer space detector, is the humanity first time by the science method attempt relation “outside the star wisdom”.although the scientist in view of the fact that between the star has the giant distance, thought that even if has the alien, is also impossible to fly to the Earth, but outside they have not denied outer space existence wisdom life possible