Teen Age Message
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| Date | August 29, 2001– September 4, 2001 |
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| Location | Yevpatoria Planetary Radar, Yevpatoria, Crimea, Ukraine |
| Participants | Alexander Zaitsev et al |
The Teen Age Message (TAM) was a series of interstellar radio transmissions sent from the Yevpatoria Planetary Radar to six solar-type stars during August–September 2001. The structure of the TAM was suggested by Alexander Zaitsev, Chief Scientist at Russia's Institute of Radio-engineering and Electronics. The message's content and target stars were selected by a group of teens from four Russian cities, who collaborated in person and via the Internet. Each transmission comprised three sections: a sounding, a live theremin concert, and digital data including images and text. TAM was humanity's fourth Active SETI broadcast and the first musical interstellar radio message.
Zaitsev's proposal for a musical message – the "First Theremin Concert for Extraterrestrials" – was submitted to the Arecibo Observatory in July 2000. It was rejected amid concerns over the dangers posed by advertising the presence of humanity to unknown and possibly highly advanced civilizations. After another unsuccessful attempt to garner support, the project was backed by the Yevpatoria RT-70 radio telescope with funding from the Education Department of Moscow. Unlike the previous digital-only messages Arecibo-1974 and Cosmic Call 1, TAM had a three-part structure, each containing different forms of information. Such structure was suggested by Alexander Zaitsev, and was intended to make the message easier to detect and interpret. The three elements of each transmission were:
According to Zaitsev, art must be central to any interstellar message. Physical laws and mathematics are almost certainly already known to extraterrestrial intelligences, but our artwork is unique to us. With this in mind, and in contrast to previous binary digital broadcasts, Zatsev proposed "not a discrete two-tone radiosignal but a more native continuous one, in which smooth frequency variations directly transfer one-dimensional emotional information. I am talking about music, which is more universally comprehensible than language, and about theremin, which is an electronic noncontact musical instrument."
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