The Teen Age Message was a METI message, transmitted from the Yevpatoria Planetary Radar to 6 nearby Sun-like stars

Solar analog

Solar-type, solar analog, and solar twin stars are those stars that are particularly similar to the Sun. The classification is a hierarchy with solar twin being most like the Sun followed by solar analog and then solar-type...

 during August–September 2001. Unlike the previous digital-only Messages, Arecibo-1974

Arecibo message

The Arecibo message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo radio telescope on 16 November 1974. It was aimed at the globular star cluster M13 some 25,000 light years away because M13 was a large and close...

 and Cosmic Call 1, the TAM has complex, three-section structure with different forms of information

Information

Information in its most restricted technical sense is a message or collection of messages that consists of an ordered sequence of symbols, or it is the meaning that can be interpreted from such a message or collection of messages. Information can be recorded or transmitted. It can be recorded as...

. Such structure was suggested by Alexander L. Zaitsev

Aleksandr Leonidovich Zaitsev

Aleksandr Leonidovich Zaitsev is a Russian and Soviet radio engineer and astronomer from Fryazino. He works on radar astronomy devices, near-Earth asteroid radar research, and SETI....

.

• Section 1 represents coherent sounding radio signal with slow Doppler
  Doppler effect
  The Doppler effect , named after Austrian physicist Christian Doppler who proposed it in 1842 in Prague, is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from...
  
   wavelength tuning to imitate transmission from Sun's center. This signal was transmitted in order to help extraterrestrials detect the TAM and diagnose the radio propagation effect of interstellar medium.
• Section 2 is analog information and represents musical melodies, performed on the Theremin
  Theremin
  The theremin , originally known as the aetherphone/etherophone, thereminophone or termenvox/thereminvox is an early electronic musical instrument controlled without discernible physical contact from the player. It is named after its Russian inventor, Professor Léon Theremin, who patented the device...
  
  . This electric musical instrument produces quasi-monochromatic signal, which is easily detectable across interstellar distances. There were seven musical compositions in the 1st Theremin Concert for Aliens.
• Section 3 represents a well-known Arecibo-like binary digital information: Logotype of TAM, bilingual Russian and English Greeting to Aliens and Image Glossary. This section and the Concert program were composed by teens from different sites of Russia.

The project is so named because of the age of most of the participants.

Stars to which the message was sent are the following:

Name	HD designation Henry Draper Catalogue The Henry Draper Catalogue is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension , published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the...	Constellation	Date sent	Arrival date
	197076	Delphinus Delphinus Delphinus is a constellation in the northern sky, close to the celestial equator. Its name is Latin for dolphin. Delphinus was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains among the 88 modern constellations recognized by the International Astronomical...	August 29 , 2001	February 2070
47 UMa 47 Ursae Majoris 47 Ursae Majoris is a solar analog, yellow dwarf star approximately 46 light-years away from Earth in the constellation of Ursa Major. , it has been confirmed that three Jupiter-like extrasolar planets orbit the star...	95128	Ursa Major Ursa Major Ursa Major , also known as the Great Bear, is a constellation visible throughout the year in most of the northern hemisphere. It can best be seen in April...	September 3 , 2001	July 2047
37 Gem	50692	Gemini Gemini (constellation) Gemini is one of the constellations of the zodiac. It was one of the 48 constellations described by the 2nd century astronomer Ptolemy and it remains one of the 88 modern constellations today. Its name is Latin for "twins", and it is associated with the twins Castor and Pollux in Greek mythology...	September 3 , 2001	December 2057
	126053	Virgo Virgo (constellation) Virgo is one of the constellations of the zodiac. Its name is Latin for virgin, and its symbol is . Lying between Leo to the west and Libra to the east, it is the second largest constellation in the sky...	September 3 , 2001	January 2059
	76151	Hydra Hydra (constellation) Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake...	September 4 , 2001	May 2057
	193664	Draco Draco (constellation) Draco is a constellation in the far northern sky. Its name is Latin for dragon. Draco is circumpolar for many observers in the northern hemisphere...	September 4 , 2001	January 2059

External links

• The TAM Schedule, Concert program and complete listing of the images and target stars
• The Teen-Age Message
• A Teen-Age Message to the Stars
• Sending and Searching for Interstellar Messages
• The First Musical Interstellar Radio Message
• details of the controversy over Zaitsev's Messages