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A Message from Earth (AMFE) is a high-powered digital radio signal that was sent on 9 October 2008 towards Gliese 581 c, a large terrestrial extrasolar planet orbiting the red dwarf star Gliese 581. The signal is a digital time capsule containing 501 messages that were selected through a competition on the social networking site Bebo. The message was sent using the RT-70 radar telescope of Ukraine's State Space Agency. The signal will reach the planet Gliese 581 c in early 2029. More than half a million people including celebrities and politicians participated in the AMFE project, which was the world's first digital time capsule where the content was selected by the public.〔 As of 22 January 2015, the message has traveled 59.48 trillion kilometers of the total 192 trillion kilometers, which is 31.0% of the distance to the Gliese 581 system.〔http://www.bebo.com/amessagefromearth〕 On 13 February 2015, scientists (including David Grinspoon, Seth Shostak, and David Brin) at an annual meeting of the American Association for the Advancement of Science, discussed Active SETI and whether transmitting a message to possible intelligent extraterrestrials in the Cosmos was a good idea; That same week, a statement was released, signed by many in the SETI community, that a "worldwide scientific, political and humanitarian discussion must occur before any message is sent". On 28 March 2015, a related essay was written by Seth Shostak and published in the New York Times. ==Concept and plan== The idea for the project was raised by Oli Madgett of RDF Digital, who was later put in charge of its implementation. The purpose of the project was to "help capture young people's imaginations and inspire them to think about our own planet earth and humanity's impact upon it." The project was carried out by RDF Digital, a subsidiary of RDF Media Group, in partnership with the social networking site Bebo. RDF Digital originally planned to run the project through a stand-alone website, but later opted for a partnership with Bebo to help it to get more attention and spread the idea quickly.〔 The main consultant for the AMFE project was Dr. Alexander L. Zaitsev, an expert in interstellar radio communication and Chief Scientist of the Radio Engineering and Electronics Institute of the Russian Academy of Science. The messages were selected in a competition hosted by Bebo, which more than 12 million Bebo users were invited to join. They were to be selected later through a web vote. An advanced third party application was developed for the AMFE project, which was integrated in Bebo's social network environment. Using this application, its users submitted text messages and pictures and drew images, which were translated into a binary format.〔 Originally, an idea of interstellar radio message composition by the public, using a special web site, was suggested by Alexander L. Zaitsev in 2002 in his abstract ''METI@home: Messages to ETI from home''.〔(Project METI@home: Messages to ETI from home )〕 Gliese 581 c, a planet orbiting around the red dwarf star Gliese 581, was chosen as the target of the message. This planet was chosen since it was believed to be capable of supporting life. Gliese 581c is 20 light years away from Earth, and the message would reach the planet in early 2029. The project was funded by advertisements, and the cost of $40,000 was borne by RDF Digital for the transmission which took four and a half hours.〔 The A Message from Earth mission team in Yevpatoria comprised: * Oli Madgett - mission commander * Dave Coombs - payload commander * Alice Levine - mission specialist * James Cooper - mission specialist * Jamie Morton - camera man 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「A Message from Earth」の詳細全文を読む スポンサード リンク
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