Abstract
Until the beginning of 2020, from 1974 to 2017, sixteen interstellar radio messages were sent to hypothetical extra-terrestrial civilizations. They were sent from different radio telescopes and had different contents. The METI (Messaging Extraterrestrial Intelligence) projects had different concepts, some of which seem highly controversial. Therefore, a short list of criteria for future METI projects is proposed. As an example, we suggest an interstellar message in the radio frequen-cy range of the electromagnetic spectrum that we call “Golden Wings of a Lemniscate” (GWL). The GWL project is a sim-ple message from Earthlings about their intelligence and readiness for interstellar contact. The digital part of the message contains ten images of lemniscates. The right half of the lemniscate includes the Golden Ratio concept with graphical drawings; the left parts of the lemniscate remain empty for ET reply messages. The experience of developing new projects of interstellar messages, initiative or response, is valuable. In the process of this work, various aspects of METI will be in-vestigated: scientific, technical, informational, cultural, ethical, educational, sociological, psychological, historical, etc.
Highlights
Star Tau Ceti has four planets discovtional Radio Astronomy Observatory in Observations continued in May, June, ered
Search for radio signals from extrater- the pioneering search for sig- Diversified research has begun on the restrial civilizations
Signals of extra- many countries, including international receiver was tuned to a frequency of terrestrial origin were not detected cooperation
Summary
Star Tau Ceti has four planets discovtional Radio Astronomy Observatory in Observations continued in May, June, ered. Data about the telescope: transmitter long-range space communications an- Everyone can participate in the devel- power, and electromagnetic transmistenna near Canberra, Australia, broad- opment of projects for future interstel- sion range; date and time of broadcastcast a four cm wavelength (7.145 MHz) lar radio messages, regardless of profes- ing, duration of broadcasting; and mesin the direction of the nearby red dwarf sional interests, nationality, religion, sage size in bits and bit rate; descrip-
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