Active SETI
Videos
Active SETI are attempts to send messages to intelligent extraterrestrial life. Active SETI messages are predominantly sent in the form of radio signals. Physical messages like that of the Pioneer pla
In 1974, the Arecibo Observatory was used to send the first known intentional radio message transmission into space
Example of a high-resolution pictorial message to potential ETI at Proxima Centauri. These messages usually contain information about the location of the solar system in the Milky Way.
The communication with extraterrestrial intelligence is a branch of the search for extraterrestrial intelligence that focuses on composing and deciphering interstellar messages that theoretically coul
Active SETI
…end, a 2018 study estimated a 1–2 megawatt infrared laser focused through a 30-45 meter telescope could be seen from about 20,000 light years away. Communication with extraterrestrial intelligence Dark forest hypothesis, the idea that planetary civilizations remain silent to avoid the possibility of contact with potentially aggressive worlds…
The illustration on the Pioneer plaque
Cover of the Voyager Golden Record
Example of a high-resolution pictorial message to potential extraterrestrial intelligence at Proxima Centauri